Watson C G
J Clin Psychol. 1977 Jan;33(1):58-63. doi: 10.1002/1097-4679(197701)33:1+<58::aid-jclp2270330111>3.0.co;2-z.
A theory that schizophrenic anhedonia-the failure to express pleasure-is associated with a tendency to interpret ambiguous stimuli as neutral rather than emotion-laden and arises from selectively high perceptual thresholds for affective stimuli was tested. Seventy-six schizophrenic males were required to guess whether words presented to them tachistoscopically for extremely short periods were positive, negative or neutral in content. The high-anhedonic Ss were significantly more likely to guess neutral words and less likely to offer pleasant interpretations than the low-anhedonic sample, which suggests that anhedonia is associated with a tendency to interpret one's environment as lacking in positive emotional value. The tresholds of high-and low-anhedonic schizophrenic groups then were compared on pleasant, unpleasant, and neutral tachistoscopically-presented stimuli. In the only two significant differences in the latter analyses, high anhedonics showed greater tresholds for neutral stimuli than low anhedonics. These findings suggest that anhedonia is not mediated by peculiarly high tresholds for affective stimuli.
一种理论认为，精神分裂症患者的快感缺失（即无法表达愉悦）与将模棱两可的刺激解释为中性而非充满情感的倾向有关，并且源于对情感刺激有选择性的高感知阈值，该理论得到了验证。76名精神分裂症男性被要求猜测以极短时间通过速示器呈现给他们的单词在内容上是积极的、消极的还是中性的。与低快感缺失样本相比，高快感缺失的受试者显著更有可能猜测单词为中性，而不太可能给出愉悦的解释，这表明快感缺失与将自身环境解释为缺乏积极情感价值的倾向有关。然后，对高快感缺失和低快感缺失的精神分裂症患者组在通过速示器呈现的愉悦、不愉快和中性刺激上的阈值进行了比较。在后者的分析中仅有的两个显著差异中，高快感缺失者对中性刺激的阈值高于低快感缺失者。这些发现表明，快感缺失并非由对情感刺激特别高的阈值所介导。
