Replication and Extension of Stephens, Hamedani, and Destin
Brian A. Clark · 2015
Part of my dissertation research will be a replication and extension of Stephens, N. M., Hamedani, M. G., & Destin, M. (2014). Closing the social-class achievement gap: A difference-education intervention improves first-generation students’ academic performance and all students’ college transition. Psychological Science, 25, 943-953. The entire committee-approved dissertation proposal (2015_04_27_dissertation_proposal_Clark.pdf) is included, but only Parts I and III are relevant to this registered replication and extension (refer to this document for background and hypotheses). Explicit description of what will be directly replicated and what will constitute extension is included as a separate document in the project descriptions folder (replication_and extension.docx). A third document in the project descriptions folder (analysis_plan) reiterates and elaborates on analysis plan information contained in the proposal. The fourth document in the project descriptions folder is an update about logistical and administrative challenges that will affect wave 0 (i.e., baseline) surveying, but will ultimately not affect analysis replication. Materials to be used in the intervention itself (e.g., scripts) are further developed from the original proposal and are included in the project materials folder. Materials to be used in surveys (i.e., measurements) are also included in the project materials folder. The committee-approved proposal contains known typos that suggest more than one intervention will be conducted. The proposal prior to defense was to implement Stephens and colleagues' (2014) difference-education intervention and Walton and Cohen's (2011) social-belonging intervention for side-by-side comparison. Upon defense, my committee recommended focusing on and maximizing sample size for the difference-education intervention. Only the difference-education intervention will be implemented, and if the target sample size (n=450) is reached, it will be triple the size of the sample in the original study.