Many Labs 3: Evaluating participant pool quality across the academic semester via replication

Affiliated institutions: University of Virginia, Center For Open Science

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Description: Many Labs 3 is a crowdsourced project that systematically evaluated time-of-semester effects across many participant pools. See the Wiki for a table of contents of files and to download the manuscript.

License: CC-By Attribution 4.0 International

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  • Type:  Research
  • Status:  Completed


Download Manuscript Here Overview Psychologists rely on undergraduate participant pools as their primary source of participants. Most participant pools are made up of undergraduate students taking introductory psychology courses over the course of a semester. Each semester the pool refreshes with a new group of students. In most, students self-regulate when to participate – either for extra cr...


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  • Observe, hypothesize, test, repeat: Luttrell, Petty, and Xu (2017) demonstrate good science

    Many Labs 3 (Ebersole et al., 2016) failed to replicate a classic finding from the Elaboration Likelihood Model of persuasion (Cacioppo, Petty, & ...

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