2026-09-20T17:23:12Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/50679 2023-07-11 col_2142_5131 col_2142_11614 com_2142_5130 com_2142_11613 com_2142_8903

Federmeier, Kara D. Gonsalves, Brian D. Hubbard, Ryan 2014-09-16T17:25:10Z 2014-09-16T17:25:10Z 2014-08 2014-09-16 2014-08 Recognition memory can be supported by two distinct processes: recollection of an item and its related contextual information, and a general sense of familiarity for the item. Performance on recollection-based associative memory tests can be supported by familiarity when stimuli are “unitized”, or encoded as a single representation. Unitization generally produces greater positivity in mid-frontal (FN400) potentials during recognition in ERP studies, also suggesting recruitment of familiarity. However, several experimental manipulations can lead to FN400 modulation, as well as differences in estimates of familiarity; thus, it is unclear what mechanism underlies this increase in familiarity-based retrieval. One proposal is that unitization may modulate the semantic relatedness between the two items; thus, unitization of stimuli with little semantic content would lead to reduced effects. To assess this claim, two ERP experiments were performed with semantically sparse stimuli (abstract images and pseudowords), in which participants either unitized stimuli or encoded them separately, and were later tested for their memory for the items. Results suggest that unitization may still be possible with semantically sparse stimuli, but that the neural correlates of unitization (namely, the FN400) are affected by this manipulation. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2014-07-25T14:59:11Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Hubbard_Ryan.docx: 1527317 bytes, checksum: b0dff893e92c931ed3a6af6eba547367 (MD5) Hubbard_Ryan.pdf: 1631077 bytes, checksum: 89a3447eac28126fa206aff5fdeeb89f (MD5) Made available in DSpace on 2014-09-16T17:25:10Z (GMT). No. of bitstreams: 3 Ryan_Hubbard.pdf: 1631077 bytes, checksum: 89a3447eac28126fa206aff5fdeeb89f (MD5) Hubbard_Ryan.docx: 1527317 bytes, checksum: b0dff893e92c931ed3a6af6eba547367 (MD5) license.txt: 4062 bytes, checksum: 314c9c53d7da8b11c0bfa70a77ce4b49 (MD5) http://hdl.handle.net/2142/50679 en Copyright 2014 Ryan Hubbard Memory semantic event related potential (ERP) N400 Unitization and semantic information text Psychology 1299 Psychology 0338 University of Illinois at Urbana-Champaign Thesis M.A. MA:Psychology -UIUC 10KS0338MA