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LIT-1836: Can we really reduce ethnic prejudice outside the lab? A meta-analysis of direct and indirect contact interventions

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StatusActive — read 2026-10-29 (NOTE-1419) in full, from the authors' accepted manuscript ("In press: European Journal of Social Psychology") posted on bildung-diversity.ch (https://bildung-diversity.ch/fileadmin/dokumente/Can_We_Really_Reduce_Ethnic_Prejudice_Outside_the_Lab.pdf); worth reading as the meta-analysis of contact interventions run outside the laboratory, which separates direct (face-to-face) from indirect (extended and virtual) programmes and finds them about equally effective on ethnic attitudes. Read it knowing that the comparison of types is between studies, not within them; that "indirect" pools extended contact, which is reading or watching stories of cross-group friendship, with virtual contact, which is online interaction and showed no effect in the stronger designs; that every outcome is a self-reported attitude, since the authors found no behavioural studies to include; and that the copy is the manuscript, not the typeset article, whose tables were not compared with it.
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Tagssocial-science, social-identity
Cited as “paper” byNOTE-1419 — Lemmer and Wagner — Can we really reduce ethnic prejudice outside the lab?

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Lemmer, G. & Wagner, U. (2015). Can we really reduce ethnic prejudice outside the lab? A meta-analysis of direct and indirect contact interventions. European Journal of Social Psychology, 45(2), 152–168. doi:10.1002/ejsp.2079

Read in full on 2026-10-29 (NOTE-1419), from the authors’ accepted manuscript.

Why this is here

The triage of 2026-10-29 put it in the File tier for CLAIM-430 and QUESTION-262. CLAIM-430’s second defeater is that information of equal favourable content, received without taking part, changes as much and as durably as cooperative enactment; its note of 2026-10-29 says that defeater “has no test in the randomized contact literature, which compares contact with no contact”. QUESTION-262’s first contrast is the same, information against cooperation. This meta-analysis estimates indirect contact programmes separately from direct ones, and the triage named it as the nearest existing evidence. Paluck, Green and Green (LIT-1420) draw some of their studies from it.

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