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 research team consists of Dr. Jennifer Trueblood, assistant professor at Vanderbilt University, and Lisa Guo, graduate student at the University of California, Irvine. Lisa will conduct the experiments at Vanderbilt with guidance from Dr. Trueblood. Lisa has three years of experience collecting experimental psychology data and interacting with groups of subjects. ---------- #### Setting/Lab/Equipment #### Wilson Hall 120 Computer Lab is a 1,335 sq ft lab equipped with 30 Mac computers plus an additional Mac computer at the front of the lab (for experimenter use). Computers are spaced far enough apart in such a way that participants will not feel observed by other participants nor the experimenter. The lab can accommodate up to 30 participants in one sitting. ![Wilson Hall 120][3] ---------- #### Sample, subjects, and randomization #### **Target sample size:** We will schedule a total of 10-14 sessions with 12-28 participants in each session, for a target sample of at least 160 total participants. **Target sample demographics:** Participants will be recruited through the Department of Psychology human subject pool. Recruitment is passive - potential subjects initiate contact with the study team through the SONA system maintained by the Department of Psychology. Participants will be at least 18 years of age and English speakers. Participants will be given a lab show-up fee of $$5 and have the opportunity to earn an additional amount beween $4 and $14 by completing the experiment, as specified by the original protocol. **Minimum sample size after exclusions:** 80 per condition. **Stopping rule(s):** If, after completing all of the scheduled testing sessions and after any exclusions, we have fewer than 80 subjects in either condition, we will schedule additional sessions of 12 - 28 participants until we have usable data from at least 80 participants in each condition (at least 160 total). **Randomization to conditions:** Participants will be randomly assigned to conditions by the provided Qualtrics Script. **Blinding to conditions:** By making sure that screens are not visible to other participants, we can ensure that participants are unaware that other participants received different instructions about time constraints. **Exclusion rules:** We will be using the same exclusion rules required by the official protocol. **Procedures for handling testing sessions for which the number of participants is not a multiple of 4:** In cases in which extra participants must be excluded from the study (e.g., if 16 participants are scheduled but only 14 arrive for the study, thus making 2 participants unable to participate), participants will be allowed to take part in the study in the order in which they arrive. Any participants that cannot be fit into a group of 4 will be given the show-up fee of $5 only and will not be able to take part in the study. ---------- #### Software/Code #### We will be using the provided materials, including the Qualtrics scripts. All computers have internet access and will be able to run surveys via Qualtrics. ---------- #### Differences from the official protocol #### There are no significant additions to or departures from official protocol to note at this time. [1]: https://osf.io/ypd78/ [2]: https://osf.io/scu2f/ [3]: https://osf.io/z9g3v/?action=download&mode=render&view_only=34ba1b53c17f4ae699f80d8e4f30ec8c&direct