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Contributors to this study are Niklas Schouler, Johanna Richter, Karina Senftner, Agnes Thurmann. We are all Bachelor Psychology students in our 3rd semester at the University of Kassel. Sophia Weissgerber is the supervisor of this project for the class "Lab Course Empirical Research". Our direct replication study is replicated as part of the Collaborative Replications and Education Project (CREP), which invites students to conduct high-quality replications of high impact research papers as a part of their methodological training. For more information on CREP please see https://osf.io/vdo0i/ We only replicate the first study of the original paper. Description of our replication methods Population The data collection will be split in a lab phase and an online phase. The original Experiment 1 was carried out in the lab; thus, we like to replicate the data collection setting. The target population are students of the University of Kassel and the target sample size for the lab is at least n = 85, because the minimum N for the CREP replication reward for this project is N = 82 (see https://osf.io/vdo0i/wiki/home/). The target sample size for the online phase is at least n = 76, totaling a combined sample size of at least N = 158. This total sample size is desirable based on a power-analysis of the reported product composite effect (see replication recipe and AsPredicted preregistration for details); it is comparable than the original N of 168. The two data collection phases are neccessary due to time and lab space constraints. Procedure We plan on conducting a direct replication keeping materials and procedures as similar as possible. Like in the original study, we will be investigating the activation of status motives and their influence on altruistic buying behaviour. To do so, we will be using the original status and control condition stories, translated to German. Furthermore, we have included the second no-control condition. The texts have been adjusted to participants' gender. According to descriptions in the original study's paper, we asked participants about their gender at the very beginning to allow for gender-matching in the stories for the experimental and control condition. ("The control and status stories were carefully matched to include interactions with same-sex peers." p. 395). The texts will be presented in an adapted way by adjusting the sex of protagonist mentioned in the stories. In the original study, there are 6 products and descriptions, which we have kept, too. The replication takes place in Germany, therefore we translated the two original text passages into German via a translate and backtranslate procedure. We have created our own control questions, because the original authors did not use any. We included control questions, to check the credibility of the cover story. Our questionnaire was created by the German tool soscisurvey. To run our study in the lab, participants will be brought to a room with several computers. To standardize the conduction of our study, we have created a script that will be read at the beginning of each session. Our participants will be given instructions both verbally and via the computer regarding the passages that will follow on the computers in front of them. Participants will be randomized between reading the status-condition-story, control-condition-story or no-story-condition, like in the original study. After important text passages (the content will later be tested by the recall-questions), the participants will be requested to decide between three different product types to choose one of two presented products. In the following, participants have to read an altruism manipulation-text which ends with winning money in a casino. At the end of the story the participant has to decide whether he/she shares any money with a friend in need and how much. Having completed the study, students will be asked if they have more questions, debriefed and rewarded with a chocolate bar. For the online part we will recruite participants on several social websites (e.g. facebook, xing, surveycircle). Analyses In order to have enough power, we are going to collect data in the lab and online and test for any differences of the setting; or use it as covariate. We plan on doing the same main analyses as in the original study. We will conduct a direct replication. The basic finding that we attempt to replicate is, that participants are more likely to choose environmental-friendly products than conventional products, if status motives have been activated. Salient status motives should increase proenvironmental and thus prosocial behavior. Our replication is successful, if effect size of a composite factor of the three products is in our prediction interval. In addition, there is an exploratory part which we have added due to a request from the original authors. They suggested to operationalize altruism in a different way and to measure political orientation. Therefore, we will test the factors status manipulation, political orientation and their potential interaction using a multiple regression model. Study design The study is a mixed design with a between-subject factor (3 levels of condition: status vs. control story vs. no-story), and a within-subject factor (3 levels of product choice: car, dishwasher, soap).
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