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Experimenters

One doctoral candidate and one Masters student under the guidance of one supervisor.

Material

  1. Mock crime (session 1). Participants first received a note with instructions before commencement of the mock crime scenario. The 'crime' involved gaining unauthorized access to a professor's email account and stealing the answers to an impending 'difficult' statistics exam.
  2. Mock crime interview (memory test 1) and condition assignment - Participants were asked nine questions, two of which were unrelated to what they had to do during the mock crime.
  3. Session 2 (memory test 2) - Participants asked were eleven questions (i.e., the nine questions from memory test one and two additional fillers). Each question/item contained four parts. The first two parts pertained to specific event details and the last two parts probed for exploratory purposes.

Recruiting

A sample of 93 undergraduate students were recruited from different universities in the Netherlands.

Sample, subjects, and randomization

There were three experimental conditions, each containing a sub-sample of 31 participants. The conditions included: false denial, simulated amnesia and truth-telling/control.

Procedure

The study used a between-subjects design. It was be divided into two parts separated by a one day interval.

The mock crime and mock crime interview (memory test 1) took place in session one. In session one participants were instructed to respond to interview questions in a condition specific manner (e.g., False-denial: "No, I did not search the professor's bag"). In session two all participants were instructed to respond honestly.

Setting/Lab/Equipment

University rooms, computers and fake email accounts and passwords.

Memory tests 1 and 2 were administered as interviews.

Expected outcomes

H1 Participants in the false denial and simulated amnesia condition would experience denial-induced forgetting.

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