de Wit Bianca, Kinoshita Sachiko
ARC Centre of Excellence in Cognition and Its Disorders, Macquarie University.
J Exp Psychol Learn Mem Cogn. 2014 Nov;40(6):1733-44. doi: 10.1037/xlm0000004. Epub 2014 Feb 24.
Semantic priming effects at a short prime-target stimulus onset asynchrony are commonly explained in terms of an automatic spreading activation process. According to this view, the proportion of related trials should have no impact on the size of the semantic priming effect. Using a semantic categorization task ("Is this a living thing?"), we show that on the contrary, there is a robust effect of relatedness proportion on the size of the semantic priming effect. This effect is not due to the participants using the prime to predict the target category/response, as manipulating the proportion of category/response-congruent trials produces a very different pattern. Taken together with response time distribution analysis, we argue that the semantic priming effect observed here is best explained in terms of an evidence accumulation process and source confusion between the prime and target.
在短启动刺激-目标刺激呈现间隔下的语义启动效应通常用自动扩散激活过程来解释。根据这一观点，相关试验的比例对语义启动效应的大小不应有影响。我们使用一个语义分类任务（“这是一个生物吗？”）表明，相反，相关性比例对语义启动效应的大小有显著影响。这种效应并非由于参与者利用启动刺激来预测目标类别/反应，因为操纵类别/反应一致试验的比例会产生非常不同的模式。结合反应时间分布分析，我们认为这里观察到的语义启动效应最好用证据积累过程以及启动刺激和目标刺激之间的来源混淆来解释。
