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Visual context processing dysfunctions in youth at high-risk for psychosis: Resistance to the Ebbinghaus illusion and its symptom and social and role functioning correlates

机译：精神病高危青年的视觉环境处理功能障碍：抵抗埃宾豪斯幻觉及其症状与社会和角色功能相关

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Impaired visual context processing is closely linked with expression of symptoms in people with psychosis. However, to date, there have been no investigations of this phenomenon in the critical ultra high-risk (UHR) period immediately preceding the onset of psychosis. A total of 73 participants (33 UHR, 40 Control) were evaluated with clinical and global functioning interviews and with a computerized task that required comparing the size of two target circles. Targets could appear by themselves (no-context condition), or within a context that made size judgment easier (helpful condition) or more difficult (misleading condition). Susceptibility to illusion was measured as the accuracy differences between the no-context and the helpful (i.e., helpful-index) and the misleading (i.e., misleading-index) conditions. Both groups exhibited approximately the same percentage of accurate responses to the no-context condition. However, the UHR subjects exhibited significantly less susceptibility to the illusion, performing superior to controls on the misleading-index. The UHR group also showed less susceptibility on the helpful-index, but this was not significant. Lower susceptibility on the misleading-index was associated with increased negative symptoms and role functioning at a trend level. Lower susceptibility on the helpful-index was significantly associated with increased negative symptoms and both poor role and social functioning. These results indicate that visual context processing is impaired during the UHR period, and is related to core illness features, suggesting that this task may be a useful biomarker in studies of UHR participants.
机译：视觉上下文处理受损与精神病患者的症状表达密切相关。但是，迄今为止，尚未在精神病发作之前的严重超高危（UHR）期间对此现象进行调查。总共对73名参与者（33名UHR，40名对照）进行了临床和全球功能面试，并通过计算机化的任务进行了评估，该任务需要比较两个目标圈的大小。目标可能自己出现（无上下文条件），也可能出现在使尺寸判断更容易（有用条件）或更困难（误导条件）的上下文中。幻觉的易感性是通过无上下文和有用（即帮助指数）和误导（即误导指数）条件之间的准确性差异来衡量的。两组对无情境条件的准确反应的百分比大致相同。但是，UHR受试者对错觉的敏感性显着降低，优于对误导指数的控制。 UHR组对帮助指数的敏感性也较小，但这并不显着。误导指数的敏感性较低与负面症状的增加和角色在趋势水平上的作用有关。有用指数的易感性降低与不良症状增加，角色和社交功能差相关。这些结果表明，在UHR期间视觉上下文处理受到损害，并且与核心疾病特征相关，这表明该任务可能是UHR参与者研究中的有用生物标记。

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