Rubin, M., & Badea, C. (2010). The central tendency of a social group can affect ratings of its intragroup variability in the absence of social identity concerns. Journal of Experimental Social Psychology, 46, 410-415. doi: 10.1016/j.jesp.2010.01.001

<p> </p> <p>People report less variability within in‑groups than within out‑groups when they make their ratings on traits on which the in‑group has a higher central tendency than the out‑group.