A social-psychology intervention effect faded across replications to nothing

Evidence

However my third study, run in 1991-92, could produce only p < . evidence for the value-manipulation effect. And a fourth experiment conducted in 1992-93 found the value confrontation had virtually no effect on Highs; in fact, the Control Highs were almost significantly more willing to set up the aboriginal scholarships than the Experimental Highs were. Put all four studies together, with all the work and money involved (my money!), and you get nothing. — Bob Altemeyer, The Authoritarian Specter, 4094

Categorization

• QUESTION: The author cites specific stats (p < .05 success then null results across four studies) — I might revisit this as a cautionary case study of replication failure in prejudice-reduction research.
• SEED: Angle: the value-confrontation attempt to reduce authoritarian prejudice is an empirical foil to Cooper’s claim that value-based moral framings soften authoritarianism — here the effect failed to replicate.
• XREF: connects to: Depolarization interventions produce small, decaying effects that fail to scale or shift downstream attitudes — Derek E. Holliday, Yphtach Lelkes, and Sean J. Westwood, Why Depolarization Is Hard: Evaluating…, 18