A systematic review of null hypothesis significance testing, sample sizes, and statistical power in research using the Implicit Relational Assessment Procedure

Following recent calls to examine the replicability of behavioral research, I examined two key determinants replicability, namely sample sizes and statistical power, in research using Implicit Relational Assessment Procedure (IRAP). A systematic review was used gather all published studies employing IRAP extract their designs sizes. The use Null Hypothesis Significance Testing found be nearly ubiquitous, justifying examination power. Using an established method, median were estimate power detect average effect size psychological (r = .20) each year. Sample they imply very low (in 2022: N 64, 0.34). At current rate growth, study will only reach recommended minimum at least 0.80 by 2080. literature directly compared with Social Personality psychology existing dataset. Median implied lower years than beginning Replication Crisis 2011, indeed subsequent years. Improvements significantly substantially larger literature. Direct tests reproducibility claims are needed.