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 protocol 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 #### Balazs Aczel, Eotvos Lorand University, lecturer, -- Barnabas Szaszi, Eotvos Lorand University, Phd student, -- Aba Szollosi, Eotvos Lorand University, MA student, -- Bence Palfi, Eotvos Lorand University, MA student, -- All members of the team have several years of experience with conducting experiments. They are all native speakers of Hungarian. For an example of our replication experience see: Aczel, B., Bago, B., & Foldes, A. (2012). Is there evidence for automatic imitation in a strategic context? Proceedings of the Royal Society B: Biological Sciences. 279(1741), 3231-3233. ---------- #### Setting/Lab/Equipment #### The experiments will be run in the official experimental computer lab of the Institute of Psychology at Eotvos Lorant University, Hungary. There are 23 workstations available of which only 12 will be used at a time for this replication study. The experimenter will be standing behind the monitors, facing the participants so that they won't feel being observed as they perform the task. The 12 workstations in use will be located 1.5 m from the neighbouring seats and will be separated by a 21 inch monitor rotated horizontally (see the pictures attached). Each workstation consists of a standard desktop computer with Windows 8 operation system, a keyboard, a mouse and a 21 inch monitor. ---------- #### Sample, subjects, and randomization #### **Target sample size:** N = 204 (17 sessions of 12 participants) **Target sample demographics:** A population of university students in exchange for course credit (for showing up) and paid in the experiment The population is expected to be female in > 60%; our usual samples have the demographics of M = 21.5 years, SD = 4 years; all students are native Hungarians. **Minimum sample size after exclusions:** The minimum sample is 160 with at least 80 participants in each condition. **Stopping rule(s):** Data collectioin will continue until the 17 scheduled sessions of 12 participants each have been completed. After that point, if exclusions result in fewer than 80 participants in either condition, we will schedule additional sessions. **Randomization to conditions:** Participants will be randomly assigned to the conditions by the provided Qualtrics Script. **Blinding to conditions:** The workstations will be located 1.5 m from the neighbouring seats and will be separated by a 21 inch monitor rotated horizontally. (See the pictures attached). **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:** We will invite 14 participants for every session to make sure that we have at least 12 participants. Participants unable to participate in the experiment will get the course credit for showing up. ---------- #### Software/Code #### We will be using the provided materials, including the Qualtrics scripts, and we have verified that they work in the laboratory. ---------- #### Differences from the official protocol #### **Payments:** No show up fee will be given as our participant will come from our local subject pool. In place of a show-up fee, participants will receive course credit toward the subject pool. As the Local Purchasing Power in Hungary is 56.74% lower than in United States (based on http://www.numbeo.com/cost-of-living/ compare_countries.jsp), we would propose 2 dollars per person available for the one-shot public goods game for our Hungarian experiments. **Translations** Our participants will be native Hungarians, thus we asked two independent researchers to translate and re-translate the protocol of the experiment. Dr Zoltan Kekecs (Baylor University, Department of Psychology and Neuroscience), who is native Hungarian, translated the materials from English to Hungarian, and Dr Melissa Wood (experimental psychologist), who have been living in Hungary for five years translated them back to English. [1]: https://osf.io/ypd78/ [2]: https://osf.io/scu2f/