In three studies, no evidence of nonconscious perception was found, although general procedures used in previous studies reporting the effect were followed. Presence/absence thresholds (Exps. 1 and 2) or recognition threshold (Exp. 3) were established for each subject. There was no difference in the effects of related and unrelated primes on voice reaction time during a word naming task. These findings raise questions about the robustness of nonconscious priming effects.
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