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Masked priming effect reflects evidence accumulated by the prime
Kinoshita, S. & NORRIS, D.
Quarterly Journal of Experimental Psychology, 63(1), 194-204
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CBU number:
In the same-different match task, masked priming is observed with the /Same/ responses but not /Different/ responses. Norris and Kinoshita's (2008) Bayesian Reader account of masked priming explains this pattern based on the same principle that explains the absence of priming for nonwords in the lexical decision task. The pattern of priming follows from the way the model makes optimal decisions in the two tasks; priming does not depend on first activating the prime, and then the target. An alternative explanation is in terms of a bias towards responding "Same" that exactly counters the facilitatory effect of lexical access. The present study tested these two views by varying both the degree to which the prime predicts the response, and the visibility of the prime. Unmasked primes produced effects expected from the view that priming is influenced by the degree to which the prime predicts the response. In contrast, with masked primes, the size of priming for the /Same/ response was completely unaffected by predictability. These results rule out response bias as an explanation of the absence of masked priming for /Different/ responses, and in turn, indicate that masked priming is not a consequence of automatic lexical access of the prime.