Bruce, Bertram C., & Rubin, Ann D. (1984). Strategies
controlling hypothesis formation in reading. In James Flood (Ed.), Promoting
(pp. 97-112). Newark, Del.: International Reading Association. Also as
Reading Education Report No. 22 (1981, June). Urbana, IL: University of
Illinois, Center for the Study of Reading.
Strategies for Controlling Hypothesis Formation in Reading
Our thanks to Ed Smith for commenting on the paper
and to Cindy Hunt for assistance in preparing it.
This research was supported in part by the National Institute of
Education under Contract No. HEW-NIE-C-400-76-0116.
Reading is a process of forming and evaluating hypotheses to account
for the data in a text.
Because of its complexity, the task of reading requires strategies for
the proliferation of hypotheses.
Four of these strategies, (a) jumping to conclusions,
(b) maintaining inertia, (c) relying on
background knowledge, and (d) working backwards from the goal,
are generally effective,
but they occasionally create reading problems, rather than alleviating
Examples from protocols of readers reading a reading test
passage are presented.
These examples show both the effective use of the strategies and some
problems that may arise from their use.
Imagine being confronted with the following task:
From a limited set of data you are to build an exceedingly complex
theory. Every step of the way you will encounter
ambiguities. Partial theories will be necessary, but there is
no way to be sure until the end that any partial theory can be
incorporated into the final theory. Almost all of the possible
theories you might consider are wrong, and yet, many of them will
have ample supporting evidence. You will be given the data
only bits at a time; thus, you may well be sent down what linguists
"garden path" of misleading theories. You cannot be certain that there
single theory that best accounts for the data. Even the best theory
you find may leave some data unaccounted for. You are to do
as you gather the data. The time allotted for the task
is vanishingly small, no more than the time it has taken you to
read this description of it.
Faced with such a task, a reasonable person might well turn his or
her thoughts elsewhere, perhaps to the ballgame outside the window; and
what many children do when they are given the task of reading. The fact
is that reading is a task with all the properties described above: The
must build a complex theory from limited data in a short time.
The data arrive pieces at a time as the eye moves across the
page. Reading at a normal pace introduces ambiguity at even the lowest
level because the reader can only sample from the text. This ambiguity
is magnified at the level of words and sentences. Other ambiguities
arise at the higher structural levels. Theories to account
for the meaning of parts of the text proliferate because the
data are limited and ambiguous, and the theories can become
increasingly complex as the reader tries to account for larger portions
text. Knowledge of the world, the prior text, the author, and the
of reading all need to be incorporated into the theories the
reader builds, but this knowledge complicates the theories further.
In this paper, we look at the process a reader must use to cope with
the kinds just described.
Essentially, we view reading as a process of forming and
evaluating hypotheses to account for the data in the text,
and we discuss the central importance in this process of four
strategies for controlling
the proliferation of hypotheses.
The view presented
is not unique; what is different is our attempt to draw out the
unforeseen implications and consequences of such a view.
By taking the notion of "controlling hypothesis formation"
seriously, identifying specific strategies and working through and
example, we describe in more detail the comprehension process when it
works - and when it goes awry.
Our analysis does not lead to prescriptions of specific instructional
methods for reading comprehension.
Instead, we hope to provide a concrete reference for teachers of
to a perspective on the comprehension process which emphasizes
Our analysis includes both a general discussion of the process of
answering questions about a reading test passage and examples from
protocols of students discussing the text.
The examples both provide empirical support for the general approach
and make the theory
more accessible to teachers, students and classrooms.
- that miscomprehension can be due to good strategies missing
- that even a seemingly straightforward text can lead to a
of varying interpretations when it is read by a group of different
- that a choice between two substantially different
from a relatively small decision in the comprehension process.
There is one rather obvious way to cope with a task of the difficulty
described above: Collect as much knowledge as is possible and
apply it at every step of the hypothesis formation process.
Such knowledge is of various types.
First, a reader needs knowledge of structures at the levels of letter
letters, words, sentences, and even whole texts.
She or he also needs knowledge of the meaning of these
structures, such as the fact that in the passive voice construction the
an action is in the syntactic subject position.
Perhaps most importantly, the reader needs pragmatic knowledge --
about the use of language.
Included in this last category are knowledge of facts about the
world, knowledge of the author, knowledge of the time and place
of the writing and reading of the text, knowledge of the task, and
knowledge of one's own
knowledge and abilities (Brown, 1980).
Discussions of the knowledge needed for reading can be found in Adams
Bruce (1980), Rumelhart (1977), Olson, Duffy, and Mack (in press), and
Spiro, Bruce, and Brewer (1980).
Essential among the types of knowledge needed for reading
is strategic knowledge, that is, knowledge about
how to use each of the above knowledge sources.
Coordinating them is a complex task, as there is increasing evidence
sources interact in a heterarchical fashion;
that is, although they may naturally form
a knowledge hierarchy running from
orthographic knowledge to expectations about overall text structure,
communication is not limited to adjacent members of the hierarchy.
Earlier models of reading postulated less complicated mechanisms.
The scenario proposed by Gough (1972) and
LaBerge and Samuels (1974), for example,
involved a visual input being processed sequentially at various
knowledge levels, and arriving, finally, at a "meaning."
More current models involve each knowledge
source putting in its "two-cents' worth"
at various points in the progression to comprehension of the text
In viewing reading as a hypothesis-driven process
(Rubin, Note 1) we define a hypothesis as a central structure which
evidence for a particular interpretation of a text.
Two general characteristics of hypotheses are important to mention
First, a hypothesis represents a possible
may later either be proven or disproven.
At various points during the reading process it may be in a state
of limbo, only partially specified, needing more evidence,
or perhaps even uncertain because of conflicting evidence.
As a consequence of additional information, the reader may later have
"back up" and re-hypothesize about the meaning of a portion of the
A second characteristic is that part of the structure of a hypothesis
specification of those pieces of evidence which support or
A piece of evidence can even be another hypothesis.
Hypotheses are then linked together in a network of "supporting" and
Several existing reading theories share significant properties
with the general form described here (although they differ in important
Goodman (1973) describes
receptive language processes in general as hypothesis-based,
defining them as "cycles of sampling, predicting, testing and
He recognizes three levels of cues which readers use: graphemic,
syntactic, and semantic;
these cue systems are used "simultaneously and
Productive reading is seen as requiring strategies which
selection of the most useful cues.
Smith (1973) emphasizes the contribution of what he terms
"nonvisual" information to reading.
This nonvisual knowledge includes what people
already know about reading, language, and the world in general.
He argues particularly that reading is not decoding to sound,
but rather that semantic and other nonvisual processes intercede
between visual processes and reading aloud.
A different approach, which nevertheless assumes a hypothesis-based
process is that of Perfetti (Note 2).
He suggests ways in which the various component processes might
interact, basing his overall
conclusions on the fact that all the processes which occur during
comprehension must share a "limited capacity processor."
The limited-capacity processor view suggests a potential problem in the
use of knowledge for reading comprehension: Although
different types of knowledge are needed to
evaluate hypotheses, each chunk of knowledge may
in the construction of new hypotheses.
Thus, evaluation and, hence, elimination, of hypotheses
vies with new hypothesis formation in determining the size of
the hypothesis space.
What is needed are strategies for controlling the proliferation of
Details of such strategies have been discussed elsewhere
(Collins, Brown, & Larkin, 1980; Erman, Hayes-Roth, Lesser,
& Reddy, 1980;
Woods, 1980; Rubin, Note 1).
The point we will make here, however, is that strategies that cut down
the number of hypotheses for
consideration have other, qualitative effects, as well.
We assume that these strategies operate within a process that maintains
hypotheses at once, but actively works
on only a few at any one time.
New hypotheses are spawned from the ones
under active consideration.
Thus, a strategy for focussing attention on one
hypothesis out of a set of competing hypotheses
(or choice set, [Rubin, Note 1])
would limit the number and type of new hypotheses that are generated.
We have identified four such strategies:
A system using these strategies can begin to cope with a task such as
But things do not always go smoothly.
The very features that enable the system to handle
uncertainties cause it to have somewhat peculiar properties, which may
both difficulties and successes in reading.
In the next section we see how a hypothesis-driven system with these
strategies might operate in reading a simple story,
and, in the following section, how it may also produce
Finally, we discuss a perspective on reading instruction that may be
drawn from these examples.
- jumping to conclusions (choosing one hypothesis out of a choice set
and focusing on it despite insufficient evidence)
- maintaining inertia (refusing to abandon a hypothesis in spite of
- relying on background knowledge (using prior knowledge to choose a
hypothesis from a set of otherwise equally possible ones)
- working backwards from the goal (choosing hypotheses which are
clearly and directly related to the goal despite insufficient evidence)
Comprehension of a Simple Story
If the reading process is in fact hypothesis-driven, we would
expect to see evidence of this characteristic in people's reading
behavior. In this section, we analyze a short passage and describe
how a hypothesis-driven process might answer comprehension questions
The passage is taken from the Educational Testing Service's
Cooperative English Tests (1960).
Although we use a test passage and the accompanying test questions
in our discussion, our purpose is not to criticize the
test, but to explore the processes involved in understanding a passage
well enough to answer questions about it.
"Alice!" called a voice.
The effect on the reader and her listener, both of whom were
sitting on the floor, was instantaneous. Each started and
sat rigidly intent for a moment; then, as the sound of approaching
footsteps was heard, one girl hastily slipped a little volume under the
coverlet of the bed, while the other sprang to her feet and in a
flustered way pretended to be getting something out of a tall wardrobe.
Before the one who hid the book had time to rise, a woman of fifty
the room and, after a glance, cried, "Alice! How often have I told you
not to sit on
"Very often, Mommy," said Alice, rising meekly, meantime casting a
glance at the bed to see how far its smoothness had been disturbed.
"And still you continue such unbecoming behavior."
"Oh, Mommy, but it is so nice!" cried the girl. "Didn't you like to sit
on the floor when you were fifteen?"
The first question on the comprehension test is:
d. a doll
In order to answer this question, the reader first must identify
the characters in the story and decide which one corresponds
to each referring expression in the text. This is no simple task, as
several different characters are introduced in the first few lines of
this story. One coherent hypothesis identifies three separate people:
the owner of the voice (later to be identified as "Mommy"), the reader
(also described as the "one girl" who "hastily slipped a little
volume under the coverlet of the bed"), and the listener
(hypothesized to be "the other" who "sprang to her feet").
There are several other only slightly less coherent hypotheses,
which a reader could easily construct. Certainly the book-hider
could be the listener and the wardrobe-looker the reader, rather than
vice-versa. Or some readers might postulate that five different
people are described,
judging the link between "the reader and the
listener" and the two girls to be insufficiently clear. In fact, if
is substituted for "the other" preceding "in the room sprang to her
this link is effectively broken and the number of people in the
room becomes unclear. The question itself, which asks about Alice's
companion (not companions) actually provides some of
straightforward evidence that there are only two people in the room
when the story opens.
Even if a reader has settled on the interpretation that identifies two
in the room, further inferences must be made to demonstrate that one of
them is Alice.
A hint is offered when the "woman of fifty" reprimands one of the girls
name. But interpreting this hint correctly requires postulating that
woman is in fact addressing "the one who hid the book" and,
furthermore, that "the reader" described several lines earlier is the
If all of these inferences are made and coordinated,
the reader of the passage can conclude that Alice's companion was a
The second question is what has been called an "inferential" question
and introduces the possibility for even more complex hypotheses:
When Alice heard the approaching footsteps, she
puzzled h. amused
In order to answer this question, the reader must first be able to
Alice and decide which of the actions described in the story
should be attributed to her.
As explained above, this in itself involves several plausible
and we can add here that it is possible to answer
the first question correctly without
deciding that Alice is the one who
hid the book rather than the one who occupied herself with the
Whichever girl is Alice, the description "started and
sat rigidly intent" will be relevant to any hypothesis about
her reaction, since both girls acted the same.
However, this reaction is easily interpretable as
either alarm or anger, and the reader must use additional information
from the text to decide between the two hypotheses.
All the other relevant details occur further on in
the text than the description of the incident we are interpreting.
Alice hides a book "hastily" and later seems concerned
that her mother not discover that it is under the coverlet.
These actions suggest guilt, but they do not
definitively discriminate between alarm and anger,
which are both plausible reactions to feeling guilty.
In fact, it seems that one of the few phrases which help
the reader determine
that Alice is alarmed
is "rising meekly"; if Alice had in fact been angry,
she most likely would have acted more aggressively.
In this case, an "incorrect" hypothesis has almost as much
supporting evidence as the correct one.
The third question is:
We may infer that Alice is:
very much in love
years of age
The phrasing of this question
alerts us to the fact that inference will be particularly important
(although we have just seen that inference is always
In fact, choosing answer c -- that
Alice is 15 -- is risky at best and in no way "provable";
a plausible case could be made for several of the choices.
Deciding on c requires knowledge of a strategy: "if
blamed for something, attempt to elicit the
sympathy of the blaming authority by getting them to admit they've done
the same thing."
In order to infer that this strategy is being applied here,
the reader must first realize that Alice is being blamed for sitting on
a conclusion which follows
fairly directly from the mother's first question, Alice's meek
response, and the mother's follow-up question.
Then we must note that, in speaking to her mother, Alice has
added a piece of information to the description of her action which
(under this hypothetical persuasion strategy)
indicates she is herself 15.
It is worthwhile noting that almost all of these conclusions
are based on the reader's understanding of the implications
of speech acts (see Cohen & Perrault, 1979).
For example, although Alice's final remark is syntactically
a question, its
real purpose is to persuade, not to gain
Neither is her mother's "How often have I told you not
to sit on the floor?" really a question;
it is closer to an accusation.
The inference of quilt is based on the reader's knowledge of
the social conventions surrounding the speech acts and of
Given that we understand, at least sketchily,
how the reader might conclude that Alice is 15, we are
still faced with an important problem in understanding how
one can answer this question.
The problem is one of control structure: How does the reader choose
this particular reasoning path out of all the possible ones to follow?
Another set of inferences might lead the reader to conclude that
Alice's mother is a stern
person, but a reader cannot afford to entertain all possible
In this case, reasoning backward from the question allows the reader
to choose the most relevant paths to follow.
Good test-takers read over the possible answers to multiple-choice
questions and use them to guide their detailed thinking.
In this case, in considering answer c, the reader
the final paragraph where there is a reference to age,
and attempts to construct a link back to the answer.
We can get some feel for the distinction between inferences made while
reading the story and those made in response to questions
by considering the comparison between a description of Alice given
just after reading the story and a description given after answering
Mention of Alice's age would be much more common in the second
description; although the information
necessary to infer her age is present in the story itself,
the actual inference is probably not made (or not remembered)
unless explicitly asked for.
There is more evidence of question-directed inference in the fourth
When she heard her name called Alice was evidently
making her bed
We know fairly directly that a "reading aloud" is taking place from
the phrase "the reader and her listener."
By following the chain of references through the next several
sentences, we can infer that it was Alice who hid the book.
However, we have no reason to believe that Alice was reading rather
the fact that she hid the book supports this hypothesis, but
does not confirm it.
A "process of elimination" strategy is necessary to answer
In this case, two of the other three possible answers are easy to
The only other answer which makes some sense is e
Alice might have been reading to herself while her companion read
out loud, possibly from the same book.
Such a hypothesis requires only a little more extrapolation than
the "reading aloud" hypothesis.
One implication of these last two examples is that a child
may do better on a reading test by using certain strategies which
might be termed test-taking skills.
These strategies are examples of reading with a goal, and
they must be considered part of the knowledge necessary to perform
well on such reading tests.
The existence of such question-based inference strategies also
points out a weakness in determining the difficulty of a text in
i.e., outside of a task definition.
It is easier in general to check whether or not a given fact is
a story than it is to answer a more general question.
Finally, the fifth question:
Alice was worried about the appearance of the bed
she had neglected to make it up
companion had been sitting on
companion was hiding under
she was afraid her mother might find the book
Answering this question is closely related to answering Questions 2 and
it requires a global hypothesis about the interaction between
Alice and her mother.
While the exchange between them demonstrates anger
on the mother's part and guilt on Alice's,
the topic of their disagreement is not, in fact,
Alice's real concern.
If it were, the answer might be b.
In fact, it is not too difficult to construct a hypothesis with
supporting evidence which would lead the reader to this response.
For a reader unfamiliar with the word "coverlet,"
it may not be clear that the act of hiding the book changed the
appearance of the bed. (Consider the difference in effect if the word
had been "dust ruffle.")
Such a reader might, in reading the fourth paragraph,
hypothesize that Alice was concerned that the bed might
be rumpled because someone had been sitting on it,
since the conversation Alice is having with her mother
at this point is about sitting in inappropriate places.
This hypothesizing process would lead the reader to choose
b as the answer.
The hypotheses which lead to the "correct" answer d
are no less complex.
We have already discussed the inference that Alice is the one
who hid the book under the coverlet;
the final move to comprehending the relationship of that
action to her mother requires some pragmatic knowledge about
why people hide things.
In a little more detail, the inferential process might proceed as
Fact from story: Alice hid the
book under the coverlet.
Real-world knowledge: People hide
things so that other people won't find them.
Hypothesis: Alice hid the book
when she heard her mother approaching.
(From the beginning, Alice knew who it was, although we did not.)
When her mother was in the room, Alice was worried about the bed.
Real-world knowledge: Hiding
something means you worry about the
other person finding it when they are around.
Conclusion: Alice was afraid her
mother might find the book.
The reader finally arrives at an answer after a long and sometimes
tenuous chain of inferences.
In a slightly more rigorous way, we can describe 12 different,
coherent interpretations of this story based on three separate
The first ambiguity involves the number of girls in the room.
We have already seen how the information given does not clearly
answer the question "How many girls were in the room?" and we will
describe below how readers
made arguments for the answers "One," "Two," and "Three."
Two of the protocols below also highlight two possible hypotheses
explaining Alice's alarm when she hears her mother's
readers decide that she is concerned either about being
caught with the book or about being caught on the floor.
They also differ in their attribution of motives to Alice.
Some feel she is sitting on the floor when her mother arrives
because she did not have time to get up,
but others feel it is a deliberate attempt to distract her
mother from the book hidden under the covers of the bed.
Taking all possible combinations of options on these three points,
(3, 2, and 2 options, respectively),
we can construct 12 interpretations of the story.
With hypotheses proliferating in this way, it's no wonder readers
resort to powerful heuristics for limiting the possibilities
The examples in this section illustrate four mechanisms for
controlling the proliferation of hypotheses.
They are drawn from oral protocols of children or adults answering
questions about the above passage after reading it.
All four demonstrate ways in which these hypothesis-limiting
strategies can go awry, leading the well-intentioned reader
to the wrong conclusion.
Jumping to Conclusions
At the beginning of a text passage, the opportunity and necessity
of jumping to conclusions with insufficient evidence is greatest.
The reader has only a limited amount of information and the
number of plausible hypotheses is large.
Obviously, the accepted conclusions are sometimes wrong:
Questioner: How many
people do you think were in the room
altogether before her mother came in?
John (an 11-year old boy; all names used in this paper are
fictitious.): Including Alice,
I think three.
Yea, because one's putting up the
wardrobe . . . no, maybe
one . . . two or three,
I'm not . . . I'm sure it's in
Q: Why don't you say what you think and then look back and see
if you think something different?
I think it was three.
Because one of them put the book under the bed and one sprang
up to the wardrobe and if Alice was sitting on the
floor at the same time and didn't have a chance to get up, then I would
much presume that one couldn't have done both those things before Alice
could get off the floor.
I'll look back now.
Q: Okay . . . you want to look back
Ah . . . yes . . . "one
girl hastily slipped a little
volume" . . . it could be
two . . . oh, there
are only two of them . . . there's
a reader and a listener and it was Alice who
put it under the bed.
In this excerpt, we can see that John decided there were three
the room because he did not take all the evidence into account.
He focused in his inference on figuring out whether or not
the same person who was standing at the wardrobe had hidden the book,
taking for granted that Alice, who remained on the floor, did neither.
John essentially missed the implication of the first line of the
third paragraph ("Before the one "), which
clarifies the fact that Alice was the one who
hid the book.
While his strategy simplified the comprehension process,
it led him to the wrong conclusion.
Notice that John, who is quite a sophisticated reader for his age, had
the ability to analyze and alter his hypothesis in the face
of new evidence;
this capacity is crucial for remedying the effects of jumping to
A rather surprising example of a reader's tendency to cling to
hypotheses even in the face of some conflicting evidence occurred when
Karen, a well-educated,
literate adult, read the passage and answered the comprehension
As it turns out, she answered only 2 out of the 5
Examining the hypotheses this subject reported in her summary, however,
we found that she
had carefully and properly articulated a "garden path" hypothesis (that
one which is plausible except for some easily-overlooked piece of
Karen made only one true mistake: She failed to connect "one
girl . . . , while the
other . . . " with the idea of two
Therefore, in her recall, Alice both hid the book and went to the
she was also sitting on the floor when her mother entered the room.
Like most readers, the subject felt obliged to account for why
the book was secret; she assumed
that it had to be a diary.
Karen paid more attention to Alice and her motives in understanding why
hid the book than do most readers;
usually readers think the mother would consider reading
the book to be sufficient cause for blame.
Her scenario, then, was that Alice was sitting on the floor by herself,
her diary, when the story opened.
In answering the first question, Karen felt that, given the options,
doll was the best answer.
Little girls do read to their dolls, and a
fantasy world is the safest place for a diary's secrets.
Since the subject didn't identify "the reader and her listener"
with "one girl . . . , while the
other," the usual path to answering this
question was blocked.
Therefore, she was obliged to rely on a longer chain of more tenuous
The second question was answered conventionally;
as discussed in the last section, Alice hurried to hide the book,
so she must have been alarmed.
The third question, beginning "We may infer that,"
suggested to the subject that further inferences
were called for.
Having already concluded that Alice was 15 years old,
she regarded that conclusion as explicitly stated,
Here again, the supposition that Alice was reading her secret
diary figures prominently in the sequence of steps Karen took
to the conclusion.
Alice could most plausibly be "very much in love"
because that would be recorded in her diary, and a girl of 15 would
especially not want her mother to know that.
The fourth question was answered reasonably given the episodic
up to answer the first question.
This structure says that when her name was called, Alice
was reading to "her listener," the doll.
The subject chose to describe it as "reading to herself" rather
than "reading aloud" because the doll was only being read to in Alice's
"Alice was evidently reading to herself."
At this point, it seems that Karen has really
stretched her hypothesis beyond the limits of feasibility.
She has had to infer a great deal which was not stated
in the passage and some of her answers do not seem too defensible
to readers who did not make the same initial hypothesis.
Yet, at each point it is easier for Karen to continue to elaborate her
than it is for her to abandon it and construct an entirely new one.
Her tendency to follow the implications of her initial reaction
has led her down the wrong path, even though such a strategy is in
general quite effective.
Relying on Background Knowledge
Carol, a fifth grader, illustrated the third strategy in her
interpretation of the text.
When a passage is difficult and too many hypotheses suggest themselves,
a reader may focus on those which are most strongly supported by his or
Carol found the story difficult and had to read it through twice;
part of her discussion with the interviewer follows:
Q: Can you remember one
specific thing you felt you didn't understand
the first time and how it helped you when you read it again?
C: I think about the volume and the coverlet and the tall wardrobe
and I didn't really understand that but when I read it over again I
said "oh yeah."
I don't know why the mother didn't want her to sit on the floor.
I mean MY GOD!
I mean I spend half of my life on the floor.
Q: Can you do the summary thing again?
Tell us again in a few sentences?
C: Umm, there was two girls and I think this is what happened,
she had a friend over or something and that
one person who's reading the book to the other person and then they
heard the mother come in and then the mother got all upset
because she was you know, they were reading on the floor and the - umm,
it was Alice, the one girl or something said didn't she sit on the
floor when you were fifteen and I was a bit sort of
flabbergasted at why would someone get so upset about you know sitting
on the floor.
Q: Why did Alice slip the book under the covers of the bed do you think?
C: I have no idea, I don't if she (inaudible) trying to put it in her
I mean if her mother gets so upset that she's sitting on the floor I
think she would take a fit that she saw a book on the floor or
Q: You think Alice's mother had ever been angry with her before for
sitting on the floor?
C: Yes because she said how many times have I told you,
actually my mother will do that when its the first time I have ever
I think (inaudible) nervous reaction.
They sort of want to scare the kids, you know.
We can see from these excerpts that Carol drew heavily from her
own interactions with her mother, commenting on both similarities and
between the story and her experience.
The reason she understood the story better the second time was that she
had read the
part in which Alice's mother gets angry at her for sitting on the
This interaction gave her a framework within which to understand the
rest of the story,
so she returned to the beginning of the story and interpreted Alice's
earlier actions in the same light.
Based on her hypothesis, Carol decided that Alice's major concern all
along had been that her mother would see the book on the floor.
In a sense, Carol seized on the one incident in the story
that struck a responsive chord for her and used it as
her perspective for viewing the whole.
In so doing, she misunderstood the beginning of the story -- in
particular, Alice's motives -- but constructed for herself a coherent
In this way, individual bits of background knowledge may have an
inordinate effect on a reader's
interpretation, as much of the text is funneled through a narrow
Backwards from the Goal
We return to Karen's protocol for an example of the fourth
We have already seen how Karen constructed a coherent misinterpretation
of the passage.
In answering the questions, Karen used the important test-taking skill
of working backwards from the possible answers.
This strategy forced her to integrate the presuppositions of her chosen
answers into her hypothesis.
Thus, her "wrong" answer for Question 1 strengthened the diary
which was therefore trusted again in Question 3.
Her answer to Question 4 was based on her answer to Question 1.
Indeed, from Karen's point of view all of the questions were based on
understanding Alice's diary: its audience, its import, its content, and
For Karen, a central strategy for comprehending test
passages and limiting hypotheses backfired and in the process
of answering the questions, she became more deeply entrenched in
her own version of the story.
A Perspective on
The examples in the previous sections
exemplify both the power and potential dangers of hypothesis-limitation
Although meaningful reading could not exist without
some such strategies, readers and teachers must also
be aware of their potential to lead to misinterpretation.
This means that diagnosing reading difficulties
may be more difficult than it first appears.
Our measures of comprehension invariably
freeze the process of comprehending
to look at some product, which
may over- or underestimate
the reader's comprehension of the text.
The hypothesis-based view we have presented
identifies dimensions on which the product may not accurately reflect
the reader's comprehension.
Getting the right answer may be a result of jumping to a conclusion
on the basis of what would ordinarily have been insufficient evidence.
A wrong answer may reflect the construction of a hypothesis only
distantly connected to the question.
For the task of simple arithmetic problems, it has been shown
(Brown & Burton, 1978) that one's first intuitions
about the source of a student's difficulties can be far off the mark.
Moreover, a simple, underlying misconception about arithmetic
may manifest itself in a variety of surface errors.
For the much more complex task of reading, we should
expect more difficulty in discovering underlying misconceptions which
affect the process.
There is one saving grace: The very intricate interconnectedness of the
hypothesis network can be turned to advantage.
Rather than insisting
that an error be traceable to a misreading of one phrase of the text,
we should be more inclined to explore the reader's
entire structure of reasoning about the text.
"Carelessness" is a attribution that says we do not understand details
of the reader's hypothesis instantiation process.
The reader (Karen) who missed 3 of 5 questions on the story
about Alice was careless, to be sure, but all readers are careless in
It is carelessness with respect to specific parts of the text and a
hypothesis that leads to difficulties.
Successful fast reading occurs when the reader's intentional
carelessness causes the
reader to miss only the bits of evidence that support
incorrect hypotheses or contradict correct ones.
Another characteristic of a hypothesis-driven process derives from
the power inherent in having knowledge of the task.
By drastically reducing the number of relevant hypotheses,
such knowledge increases
one's reading effectiveness, but, of course, only with
respect to the given task.
This explains why asking questions before reading is so effective.
A question defines the task for the reader, thereby suggesting which
hypotheses are most worth developing.
Asking questions after reading can similarly focus a reader's
(or re-interpretation) on specific aspects of the story,
as was shown in our Alice story
protocol.@note[Similar results have been found in research
on perspective-taking (Anderson, Pichert, & Shirey, 1979).]
Closely related to the issue of specific questions is that of
general purpose for reading a particular text.
Reading with a different understanding of purpose from that of the
author or another reader can lead to radically different
a text or to comprehension difficulties (see Adams & Bruce,
Perhaps some readers' difficulties may be traceable to their failure
to read with a purpose, or to their working towards inappropriate goals.
These considerations suggest that it is essential to ensure that
the reading task involve a credible purpose and that the text
itself not betray that purpose.
It is too often the case that the communicative function of a text,
to persuade, to inform, to entertain, or whatever, gets
obscured in the processes of
simplifying, standardizing, and so on, that
are carried out before its inclusion in a school book.
When students are trying to master a skill as complex as reading
they need and deserve texts that provide clear purposes that help
control the hypothesis formation process.
One of the great frustrations for a writer is that thoughts can never
completely and accurately encoded into words.
It is impossible to draw the line that says, "this thought is not
the present issue."
Also, words themselves have histories of personal use which
call forth both wanted and unwanted meanings.
What a writer can do is to suggest, to point, to indicate, or
at most, to draw a blueprint.
It is then the reader's task to create anew from that blueprint
a meaning that, to the extent that communication succeeds, matches the
writer's salient thoughts.
Reading is not decoding symbols, but
creating meaning from symbols.
As a creator of meaning, the reader draws on many resources, especially
various kinds of knowledge and the ability to construct hypotheses.
Equally importantly, the reader has strategies for applying this
knowledge, strategies which limit the proliferation
These strategies are necessary and are used to good effect by
readers, but they also sometimes lead to unexpected difficulties.
Understanding this process is an essential part of our understanding of
The perspective this viewpoint affords can be an aid to teachers in
about the underlying causes of poor reading comprehension.
Adams, M. J., & Bruce, B. C. Background
knowledge and reading comprehension (Reading Education Report No. 13).
Urbana: University of Illinois, Center for the Study of Reading,
(Eric Document Reproduction Service No. ED 181 431)
Anderson, R.C., Pichert, J.W., & Shirey, L.L.
Effects of the reader's schema at different points in time
(Tech. Rep. No. 119).
Urbana: University of Illinois, Center for the Study of Reading,
(ERIC Document Reproduction Service No. ED 169 523)
Brown, A. L. Metacognitive development and reading. In R. J. Spiro, B.
C. Bruce & W. F. Brewer (Eds.), Theoretical
issues in reading comprehension. Hillsdale, N.J.: Erlbaum,
Brown, J. S., & Burton, R. R.
Diagnostic models for procedural bugs in basic mathematical skills.
Cognitive Science, 1978,
Cohen, P. R., & Perrault, C. R.
Elements of a plan-based theory of speech acts.
Cognitive Science, 1979, 3,
Collins, A., Brown, J. S., & Larkin, K. M.
Inference in text understanding.
In R.J. Spiro, B.C. Bruce, & W.F. Brewer (Eds.),
Theoretical issues in reading comprehension.
Hillsdale, N.J.: Erlbaum, 1980.
Educational Testing Service.
Cooperative English tests.
Menlo Park, California: Addison-Wesley Publishing Co., 1960.
Erman, L. D., Hayes-Roth, F., Lesser, V. R., & Reddy, D. R. The
hearsay-II speech-understanding system: Integrating knowledge to
Computing Surveys, 1980, 12,
Goodman, K.S. Psycholinguistic universals in the reading process.
In F. Smith (Ed.), Psycholinguistics and reading.
New York: Holt, Rinehart & Winston, 1973.
Gough, P. One second of reading. In J.P. Kavanagh & I.G.
(Eds.), Language by eye and by ear. Cambridge,
LaBerge, D., & Samuels, S.J. Toward a theory of automatic
processing in reading. Cognitive Psychology, 1974, 6,
Olson, G.M., Duffy, S.A., & Mack, R.L.
Knowledge of writing conventions in prose comprehension.
In W. J. McKeachie & K. Eble (Eds.), New
directions in learning and teaching.
San Francisco: Jossey-Bass, in press.
Rumelhart, D.E. Understanding and summarizing brief stories.
In D. LaBerge & J. Samuels (Eds.),
Basic processes in reading: Perception and
Hillsdale, N.J.: Erlbaum, 1977.
Smith, F. (Ed.) Psycholinguistics and reading. New
York: Holt, Rinehart &
Spiro, R. J., Bruce, B. C., Brewer, W. F. (Eds.).
Theoretical issues in reading comprehension.
Hillsdale, N.J.: Erlbaum, 1980.
Multiple theory formation in high-level perception.
In R.J. Spiro, B.C. Bruce, & W.F. Brewer (Eds.),
Theoretical issues in reading comprehension.
Hillsdale, N.J.: Erlbaum, 1980.
1. Rubin, A. D. Hypothesis formation and
evaluation in medical
diagnosis (Report AI-TR-316).
Cambridge: Massachusetts Institute of Technology, Artificial
Intelligence Laboratory, 1975.
2. Perfetti, C.A. Language comprehension
and fast decoding:
Some psycholinguistic prerequisites for skilled reading comprehension.
Paper presented at the International Reading Association summer seminar
on the Development of Reading Comprehension,
Newark, Delaware, July 1975.