Department of Psychiatry, Songshan Armed Forces General Hospital, Taipei, Taiwan, ROC.
Soc Psychiatry Psychiatr Epidemiol. 2012 Aug;47(8):1221-34. doi: 10.1007/s00127-011-0428-y. Epub 2011 Aug 23.
The Peters et al. Delusions Inventory (PDI) is a commonly used instrument to measure delusion proneness in the general population and includes dimensions that measure distress, preoccupation, and conviction of unusual beliefs. This self-report scale has already been translated into several languages. However, there has not been a validated Taiwanese version previously reported. The aims of the present study were to translate and test the cross-cultural reliability and validity of the PDI in Taiwanese as well as to establish its sensitivity, specificity, and discriminative validity.
We administered the questionnaire to a consecutive sample of 253 participants with (n = 154; clinical group including schizophrenia and affective psychosis) or without psychotic disorders (n = 99; non-clinical group). In addition to the Taiwanese version of the PDI (PDI-T), the Taiwanese version of the Brief Psychiatric Symptom Rating Scale (BSRS) was used to measure the severity of psychopathology. We tested the psychometric properties of the PDI-T, including its construct validity, internal consistency, test-retest reliability, concurrent, and discriminative validity.
Overall, the PDI-T showed good construct validity, internal consistency, and stability over time, and it was significantly correlated with the BSRS subscales of psychotic symptoms. The convergent and discriminative validity was satisfactory. The area under the receiver operating characteristic curve of the PDI-T was 0.752. This research found that the most appropriate PDI-T yes/no cut-off scores for determining the absence and presence of delusion proneness were 5 and 13.
The PDI is a reliable and valid instrument for measuring the dimensionality of delusion proneness and appears to complement subclinical psychosis assessment scales for both epidemiological and clinical research in Taiwan.
彼得斯妄想量表（PDI）是一种常用于衡量一般人群妄想倾向的常用工具，包括衡量困扰、专注和坚信异常信念的维度。这个自评量表已经被翻译成多种语言。然而，以前没有报告过经过验证的中文版。本研究的目的是翻译并检验 PDI 在台湾人群中的跨文化信度和效度，并确定其敏感性、特异性和区分效度。
我们对 253 名患有或不患有精神障碍的参与者（n=154；包括精神分裂症和情感性精神病的临床组和 n=99；非临床组）连续进行了问卷调查。除了 PDI 的中文版（PDI-T）外，还使用台湾版Brief Psychiatric Symptom Rating Scale（BSRS）来衡量精神病理学的严重程度。我们测试了 PDI-T 的心理测量学特性，包括其结构效度、内部一致性、重测信度、同时和区分效度。
总体而言，PDI-T 表现出良好的结构效度、内部一致性和随时间的稳定性，与 BSRS 的精神病症状分量表显著相关。同时，其区分效度和收敛效度也令人满意。PDI-T 的受试者工作特征曲线下面积为 0.752。本研究发现，确定妄想倾向缺失和存在的最适当的 PDI-T 是/否截断分数为 5 和 13。
PDI 是一种可靠有效的测量妄想倾向维度的工具，它似乎可以补充台湾的亚临床精神病评估量表，用于流行病学和临床研究。
