Perrin and Spencer's 1980 British replication found conformity had nearly vanished (one join in 396 trials), arguing the Asch effect was a child of its time. Bond and Smith's 1996 meta-analysis further found conformity rates differ across cultures and genders, with collectivist cultures showing higher rates than individualist ones.
What would resolve this Systematic cross-cultural and cross-era replication with standardized methodology, isolating cultural-moment effects from a stable underlying conformity mechanism.
OpenSocial psychology / cross-cultural psychologySimplyPsychology: Asch Conformity