|Abstract:||We review research designs of ESM studies conducted in workplace settings (k = 167 samples). Eight ESM design features are summarized: sample size and number of observations, response rates, recruitment methods and incentives, survey timing factors (study duration, signal frequency, times of day), signaling strategies and reminder technologies, survey media, survey items (number of items, item sampling, constructs measured), and analytic strategies (lagged analyses, missing data treatment). Mean sample size was 93 and number of observations was 1,419. Average study duration was 10.13 days. Among studies that used multiple signals per day (56%), the average was 4.16 signals per day. 54% of studies did not report using incentives, 41% did not use reminders. Longer studies were more likely to provide incentives. Over time, online surveys are rising whereas paper-and-pencil surveys are disappearing. The average between-persons response rate was 63%, and within-persons response rate was 80%; although response rates were unrelated to incentives/design features. Interval-contingent signaling was most prevalent (59%), followed by signal-contingent signaling (19%). Event-contingent signaling was rare (4%). Few studies reported missing data treatments. Findings and implications are discussed.