Frequency estimation and semantic ambiguity do not eliminate ‎conjunction bias, when it ‎occurs: Replication and extension of ‎Mellers, Hertwig, and Kahneman (2001)‎

Mellers, Hertwig, and Kahneman (2001) conducted an adversarial collaboration to try resolve Hertwig’s contested view that frequency formats eliminate conjunction effects, effects are largely due semantic ambiguity. We a pre-registered well-powered very close replication ‎(N = 1032), ‎testing two personality profiles (Linda James) in four conditions between-subject design comparing unlikely likely items "and" "and are" conjunctions. Linda profile findings were support of effect consistent with Tversky Kahneman’s (1983) arguments for representative heuristic. found no Findings James failed replication, effect. provided additional tests addressing possible reasons, line later literature suggesting may be context-sensitive. discuss implications research on effect, call further replications extensions classic judgment decision-making.