Vallila-Rohter Sofia, Kiran Swathi
J Speech Lang Hear Res. 2015 Aug 1;58(4):1195-209. doi: 10.1044/2015_JSLHR-L-14-0257.
Our purpose was to study strategy use during nonlinguistic category learning in aphasia.
Twelve control participants without aphasia and 53 participants with aphasia (PWA) completed a computerized feedback-based category learning task consisting of training and testing phases. Accuracy rates of categorization in testing phases were calculated. To evaluate strategy use, strategy analyses were conducted over training and testing phases. Participant data were compared with model data that simulated complex multi-cue, single feature, and random pattern strategies. Learning success and strategy use were evaluated within the context of standardized cognitive-linguistic assessments.
Categorization accuracy was higher among control participants than among PWA. The majority of control participants implemented suboptimal or optimal multi-cue and single-feature strategies by testing phases of the experiment. In contrast, a large subgroup of PWA implemented random patterns, or no strategy, during both training and testing phases of the experiment.
Person-to-person variability arises not only in category learning ability but also in the strategies implemented to complete category learning tasks. PWA less frequently developed effective strategies during category learning tasks than control participants. Certain PWA may have impairments of strategy development or feedback processing not captured by language and currently probed cognitive abilities.
我们的目的是研究失语症患者在非语言类别学习过程中的策略运用情况。
12名无失语症的对照参与者和53名失语症患者（PWA）完成了一项基于计算机反馈的类别学习任务，该任务包括训练和测试阶段。计算测试阶段的分类准确率。为了评估策略运用情况，在训练和测试阶段进行了策略分析。将参与者的数据与模拟复杂多线索、单特征和随机模式策略的模型数据进行比较。在标准化认知语言评估的背景下评估学习成功情况和策略运用情况。
对照参与者的分类准确率高于失语症患者。在实验的测试阶段，大多数对照参与者采用了次优或最优的多线索和单特征策略。相比之下，在实验的训练和测试阶段，很大一部分失语症患者采用了随机模式或没有策略。
个体差异不仅出现在类别学习能力上，也出现在完成类别学习任务所采用的策略上。在类别学习任务中，失语症患者比对照参与者更不常制定有效的策略。某些失语症患者可能存在未被语言和当前所探究的认知能力所捕捉到的策略发展或反馈处理障碍。
