Russell Warne has preregistered a protocol for a meta-analysis of stereotype threat effects among African Americans with coauthor Ross Larsen. It's published in PLOS ONE and can be found here: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0306030

Russell and Ross have five research goals, listed here:

This poll asks: What will the meta-analytic effect size without adjustments for moderators or publication bias be? The market will resolve to the range the effect size ultimately falls in whenever a preprint comes out or the paper is published.

Tweet thread link: https://x.com/Russwarne/status/1816173700166959390

For the sake of clarity: a negative effect size indicates bias against African Americans. The effect size is the SMD, whether Cohen's d, Hedge's g, or whatever else Warne and Larsen may choose to use. It will be the effect size derived from their preregistered first and second designs, i.e., the designs dealing with the within-person effects of stereotype threat and the between-person treatment effect of stereotype threat.