Implementation Details ---------------------- This page describes how our lab implemented the procedures required by the official protocol for the RRR. It also describes and justifies any additions to or departures from that protocol. You can view the official protocl and the main project page for this RRR using these links: - Official Protocol: [https://osf.io/ypd78/][1] - Main RRR project page: [https://osf.io/scu2f/][2] ---------- #### Experimenters #### The testing will be conducted by Dutch-speaking research assistants. The research assistants will have varying levels of expertise (for example, the project will involve first-year research interns and third-year students working on bachelors theses). The research assistants will be supervised by Linda Oosterwij, an advanced second-year Research Master student who has four years of experience conducting studies on judgment and decision-making. Each testing session will be conducted by a pair of research assistants. Testers will be required to complete the Social Psychology department’s required training for laboratory research. To train research assistants with the current protocol, a series of practice sessions will be conducted one-week before the beginning of data collection. ---------- #### Setting/Lab/Equipment #### Testing will be conducted at the Tilburg University SP-lab. The lab has 24 individual testing stations arranged into two groups of 12. The testing stations are enclosed cubicles that are connected through an intercom system. There is a desktop PC (Dell) inside each testing station. There is also a waiting area with seating for participants. SP-lab waiting area: https://osf.io/8b6cn/ ![enter image description here][3] SP-lab cubicle area: https://osf.io/ezutc/ ![enter image description here][4] SP-lab testing station: https://osf.io/9dqbx/ ![enter image description here][5] ---------- #### Sample, subjects, and randomization #### **Target sample size:** We will schedule a total of 14 sessions with 12 participants in each session, for a target sample of 168 participants. **Target sample demographics:** Our participants will be first-year psychology students. These students will receive 30-minutes worth of participation credit for completing the study. First-year students are 18-19 years old and about 70% women. To ensure that participants are naïve, data collection will be conducted at the beginning of the academic year. **Minimum sample size after exclusions:** The minimum sample size is 150 participants (75 participants in each condition). **Stopping rule(s):** If, after completing all of the scheduled testing sessions and after any exclusions, we have fewer than 75 subjects in either condition, we will schedule additional sessions of 12 participants until we have usable data from at least 75 participants in each condition. **Randomization to conditions:** Participants will be randomly assigned to conditions by the provided Qualtrics Script. **Blinding to conditions:** Participants will complete the study in enclosed cubicles. Therefore, it will not be possible for participants to learn about other experimental conditions during the study. At the end of the experiment, participants will be debriefed and encouraged not to discuss the specific details of the experiment. **Exclusion rules:** Participants will be marked for exclusion if they did not complete all tasks, or if the experimenter / computer incorrectly administered the task or instruction. Exclusion decisions will be made by the authors without knowledge of experimental condition. **Procedures for handling testing sessions for which the number of participants is not a multiple of 4:** Extra participants will be assigned to complete an alternate 30-minute study on decision-making. This study will have no overlap in content with the replication. ---------- #### Software/Code #### We will use the provided materials, including the Qualtrics scripts, and we verify that they work in our lab. ---------- #### Differences from the official protocol #### Our materials do not contain any significant additions to or departures from the official protocol. ---------- #### Translation #### The protocol was translated into Dutch by Anna van’t Veer. The translated materials were then sent to Peter Verkooijen, who back-translated the materials and suggested several revisions. The revisions were then discussed (and approved) by the authors. Translation of materials: https://osf.io/s5hpw/ [1]: https://osf.io/ypd78/ [2]: https://osf.io/scu2f/ [3]: https://osf.io/8b6cn/?mode=render&action=download&accept_url=false [4]: https://osf.io/ezutc/?mode=render&action=download&accept_url=false [5]: https://osf.io/9dqbx/?mode=render&action=download&accept_url=false