The Weapons Identification Task: Recommendations for adequately powered research

This article synthesizes the extant literature on the Weapons Identification Task (WIT), a sequential priming paradigm developed to investigate the impact of racial priming on identification of stereotype-congruent and stereotype-irrelevant objects. Given recent controversy over the replicability of and statistical power required to detect priming effects, the aim of this synthesis is to systematically assess the literature in order to develop recommendations for statistical power in future research with the WIT paradigm. To develop these recommendations, the present article first quantitatively ascertains the magnitude of publication bias in the extant literature. Next, expected effect sizes and power recommendations are generated from the extant literature. Finally, a close conceptual replication of the WIT paradigm is conducted to prospectively test these recommendations. Racial priming effects are detected in this prospective test providing increased confidence in the WIT priming effect and credibility to the proposed recommendations for power.