Bodner Glen E, Masson Michael E J, Richard Norann T
Department of Psychology, University of Calgary, Alberta, Canada.
Mem Cognit. 2006 Sep;34(6):1298-311. doi: 10.3758/bf03193273.
Although subjects have little or no awareness of masked primes, Bodner and Masson (2001) found that priming of lexical decisions is often enhanced when masked repetition primes occur on a high proportion of trials. We used baseline prime conditions to specify the locus of this repetition proportion (RP) effect. In Experiments 1A and 1B, a .8-RP group showed more priming than did a .2-RP group, and this RP effect was due to both (1) increased facilitation from repetition primes and (2) increased interference from unrelated primes. In Experiment 2, we used the baseline condition to show that subjects are sensitive to RP rather than to the proportion of unrelated primes. Direct comparisons of a given prime condition (repetition, unrelated) across RP conditions were more stable than were comparisons relative to the baseline condition. The increased costs and benefits of repetition priming when RP is higher implicate a context-sensitive mechanism that constrains accounts of masked priming.
尽管被试对掩蔽启动刺激几乎没有或完全没有意识，但博德纳和马森（2001年）发现，当掩蔽重复启动刺激在很大比例的试验中出现时，词汇判断的启动效应通常会增强。我们使用基线启动条件来确定这种重复比例（RP）效应的位点。在实验1A和1B中，.8-RP组比.2-RP组表现出更强的启动效应，这种RP效应归因于两个方面：（1）重复启动刺激带来的促进作用增加，以及（2）无关启动刺激带来的干扰增加。在实验2中，我们利用基线条件表明，被试对RP敏感，而不是对无关启动刺激的比例敏感。跨RP条件对给定启动条件（重复、无关）进行直接比较，比相对于基线条件进行比较更稳定。当RP较高时，重复启动的成本和收益增加，这意味着存在一种上下文敏感机制，该机制限制了对掩蔽启动的解释。
