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 #### Horne has a PhD in Philosophy from the University of Illinois. Salomon and Horne are doctoral students in the University of Illinois Psychology Department. They have received training and have much experience in experimental methods, statistical data analysis, and open science practices. Both are native English speakers. Salomon is experienced in using R for data manipulation and analysis. ---------- #### Setting/Lab/Equipment #### Participants will be tested in person in computer laboratories in the University of Illinois Psychology building (rooms 357, 37, and 289). These rooms accommodate 12 or more people and have private work stations where participants will not be able to see other participants’ computer screens. Photographs showing workstations available in these lab spaces are available in the [files section](https://osf.io/6j4rb/files/). ---------- #### Sample, subjects, and randomization #### **Target sample size:** We will schedule a total of 10 sessions with 20 participants in each session, for a target sample of 200 participants **Target sample demographics:** We will recruit participants through the University of Illinois Psychology Department's Paid Subject Pool. Participants will be required to be U of I students between 18 and 35 years old. Participants will be paid in cash via a grant from the Association for Psychological Science. **Minimum sample size after exclusions:** Our minimum sample size is 90 participants in each condition. **Stopping rule(s):** If, after completing all of the scheduled testing sessions and after any exclusions, we have fewer than 90 subjects in either condition, we will schedule additional sessions of 20 participants until we have usable data from at least 90 participants in each condition." **Randomization to conditions:** Participants will be randomly assigned to conditions by the provided Qualtrics Script. **Blinding to conditions:** The workstations in rooms 35 and 37 are in individual cubbies, from which participants will not be able to view other participants' computers or hear other participants' interactions with experimenters (e.g., if they ask questions during the study). For this reason, we will preferentially schedule participants in rooms 35 and 37. If necessary, we will use room 289. Room 289 consists of several individual cubbies, a large instructional room with additional computers, and an atached lab with densely packed workstations. We will use the cubbies and seat participants at the maximal distance, plus use cardboard dividers to prevent participants from seeing each other's screens in room 289. **Exclusion rules:** We will be using the same exclusion rules required by the official protocol. We will retain data from excluded participants, but mark them for exclusion. And, exclusion decisions will be made by someone blind to condition assignment. **Procedures for handling testing sessions for which the number of participants is not a multiple of 4:** We will schedule 20 participants per session and test participants in the largest multiple of 4 available (e.g., if 19 participants arrive, we will test 16 in the Rand protocol and divert the three remaining participants to another study). ---------- #### Software/Code #### We will be using the provided materials, including the Qualtrics script, and have verified that they work in our laboratory. ---------- #### Differences from the official protocol #### Not applicable. [1]: https://osf.io/ypd78/ [2]: https://osf.io/scu2f/