Bifactor Structure of the Schizotypal Personality Questionnaire Across the Schizotypy Spectrum.
Bifactor Structure of the Schizotypal Personality Questionnaire Across the Schizotypy Spectrum.
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DOI：
10.1521/pedi_2020_34_466
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发表时间：
2020-02
影响因子：
2.3
通讯作者：
A. Moussa-Tooks;Allen J. Bailey;A. Bolbecker;R. Viken;B. O’Donnell;W. Hetrick
中科院分区：
文献类型：
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作者：
A. Moussa-Tooks;Allen J. Bailey;A. Bolbecker;R. Viken;B. O’Donnell;W. Hetrick
尽管在精神分裂症谱系研究中被广泛使用，但精神分裂症人格问卷(SPQ)的一个得到经验支持和理论上有意义的因素结构仍然存在不确定性。目前已识别的结构受到完全依赖非临床样本的限制。目前的研究比较了335名非精神病型个体、292名分裂型谱个体(精神分裂症、分裂型情感障碍或分裂型人格障碍)和混合组(N=627)的SPQ的因子结构。除了双因素模型外，还评估了单维、相关和分层模型，其中子量表同时加载到一般因素和特定因素上。最适合样本的模型是两个特定因素双因素模型，与分裂类型的九个症状维度一致，主要是单一结构的直接表现。这些发现首次在临床样本中显示，对跨诊断方法具有广泛的影响，包括将分裂型作为现象学在广泛严重性范围内的不同表现的一种构建。
Despite widespread use in schizophrenia-spectrum research, uncertainty remains around an empirically supported and theoretically meaningful factor structure of the Schizotypal Personality Questionnaire (SPQ). Current identified structures are limited by reliance on exclusively nonclinical samples. The current study compared factor structures of the SPQ in a sample of 335 nonpsychiatric individuals, 292 schizotypy-spectrum individuals (schizophrenia, schizoaffective disorder, or schizotypal personality disorder), and the combined group (N = 627). Unidimensional, correlated, and hierarchical models were assessed in addition to a bifactor model, wherein subscales load simultaneously onto a general factor and a specific factor. The best-fitting model across samples was a two-specific factor bifactor model, consistent with the nine symptom dimensions of schizotypy as primarily a direct manifestation of a unitary construct. Such findings, for the first time demonstrated in a clinical sample, have broad implications for transdiagnostic approaches, including reifying schizotypy as a construct underlying diverse manifestations of phenomenology across a wide range of severity.