Zaki Safa R
Department of Psychology, Bronfman Science Center, Williams College, Williamstown, MA 01267, USA.
Psychon Bull Rev. 2004 Dec;11(6):1048-54. doi: 10.3758/bf03196735.
Most published studies of category learning in amnesia have reported intact categorization performance. These results have been used to challenge single-system accounts of categorization and recognition, in which a single representational system mediates performance in these two tasks. Many of the published studies, however, have shown a numerical advantage for controls over amnesics and often have had low statistical power. A meta-analysis was conducted to assess whether this numerical advantage is significant when the data are pooled across studies. This analysis indicates that amnesic subjects do, in fact, show deficits in categorization tasks, which is consistent with single-system exemplar model predictions.
大多数已发表的关于失忆症患者类别学习的研究都报告称其分类表现完好。这些结果被用于挑战分类和识别的单系统理论，即在这两项任务中，单一表征系统介导了表现。然而，许多已发表的研究显示，对照组在数值上优于失忆症患者，且往往统计效力较低。我们进行了一项荟萃分析，以评估当跨研究汇总数据时，这种数值优势是否显著。该分析表明，失忆症患者在分类任务中实际上确实表现出缺陷，这与单系统范例模型的预测一致。
