Abstract：
OBJECTIVE: Previous studies have found deficits in imaginative elaboration and social inference to be associated with agenesis of the corpus callosum (ACC; Renteria-Vasquez et al., 2022; Turk et al., 2009). In the current study, Thematic Apperception Test (TAT) responses from a neurotypical control group and a group of individuals with ACC were used to further study the capacity for imaginative elaboration and story coherence.
METHODS: Topic modeling was employed utilizing Latent Diritchlet Allocation to characterize the narrative responses to the pictures used in the TAT. A measure of the difference between models (perplexity) was used to compare the topics of the responses of individual participants to the common core model derived from the responses of the control group. Story coherence was tested using sentence-to-sentence Latent Semantic Analysis.
RESULTS: Group differences in perplexity were statistically significant overall, and for each card individually (p < .001). There were no differences between the groups in story coherence.
CONCLUSIONS: TAT narratives from persons with ACC were normally coherent, but more conventional (i.e., more similar to the core text) compared to those of neurotypical controls. Individuals with ACC can make conventional social inferences about socially ambiguous stimuli, but are restricted in their imaginative elaborations, resulting in less topical variability (lower perplexity values) compared to neurotypical controls.
METHODS: Topic modeling was employed utilizing Latent Diritchlet Allocation to characterize the narrative responses to the pictures used in the TAT. A measure of the difference between models (perplexity) was used to compare the topics of the responses of individual participants to the common core model derived from the responses of the control group. Story coherence was tested using sentence-to-sentence Latent Semantic Analysis.
RESULTS: Group differences in perplexity were statistically significant overall, and for each card individually (p < .001). There were no differences between the groups in story coherence.
CONCLUSIONS: TAT narratives from persons with ACC were normally coherent, but more conventional (i.e., more similar to the core text) compared to those of neurotypical controls. Individuals with ACC can make conventional social inferences about socially ambiguous stimuli, but are restricted in their imaginative elaborations, resulting in less topical variability (lower perplexity values) compared to neurotypical controls.
摘要：
目的：先前的研究发现，想象力的完善和社会推理的缺陷与call体的发育不全有关（ACC；Renteria-Vasquez等人。,2022年；Turk等人。,2009).在目前的研究中,来自神经典型对照组和一组ACC患者的主题感知测试（TAT）反应被用来进一步研究富有想象力的阐述和故事连贯性的能力。
方法：主题建模是利用潜在的Diritchlet分配来表征对TAT中使用的图片的叙事反应。使用模型之间差异的度量（困惑）来比较各个参与者的反应主题与从对照组的反应得出的共同核心模型。使用句子到句子的潜在语义分析测试了故事的连贯性。
结果：组的困惑差异在总体上具有统计学意义，和每个卡单独（p<.001）。两组之间的故事连贯性没有差异。
结论：来自ACC患者的TAT叙述通常是连贯的，但更传统(即，与核心文本更相似)，与神经典型对照相比。有ACC的人可以对社会模糊的刺激做出传统的社会推断，但在他们富有想象力的阐述中受到限制，与神经典型对照相比，局部变异性较小（困惑值较低）。
方法：主题建模是利用潜在的Diritchlet分配来表征对TAT中使用的图片的叙事反应。使用模型之间差异的度量（困惑）来比较各个参与者的反应主题与从对照组的反应得出的共同核心模型。使用句子到句子的潜在语义分析测试了故事的连贯性。
结果：组的困惑差异在总体上具有统计学意义，和每个卡单独（p<.001）。两组之间的故事连贯性没有差异。
结论：来自ACC患者的TAT叙述通常是连贯的，但更传统(即，与核心文本更相似)，与神经典型对照相比。有ACC的人可以对社会模糊的刺激做出传统的社会推断，但在他们富有想象力的阐述中受到限制，与神经典型对照相比，局部变异性较小（困惑值较低）。
