True Scientific Discoveries: What Research Approach is Most Cost-Effective?

Instructions: Use presets or change parameter values manually to explore the cost-effectiveness of different research approaches to unearth true scientific discoveries. For detailed explanation and conceptual background, see LeBel, Campbell, & Loving (in press, JPSP), Table 3. NOTE: Plot only changes when assumption parameters are modified.

Main variables

Type I error rate:

Power level of original studies:

Base rate of true hypotheses:


Individual researcher subject pool resources (N):

Number of replications per positive results:

Power of replication studies:

Average social psychology effect size (Cohen's d):

This app is an extension of Zehetleitner and Felix Schönbrodt's (2016) positive predictive value app. Source code for this app available here.