Meng Sun1, Dongfang Wang2, Ling Jing3, Chang Xi4, Libo Dai5, Liang Zhou6. 1. Department of Social Psychiatry, the Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China. 2. Department of Social Psychiatry, the Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China; Centre for Studies of Psychological Applications, Guangdong Key Laboratory of Mental Health and Cognitive Science, Ministry of Education Key Laboratory of Brain Cognition and Educational Science, School of Psychology, South China Normal University, Guangzhou, Guangdong, China. 3. Case Western Reserve University School of Medicine, Cleveland, OH, United States. 4. Department of Psychiatry, China National Clinical Research Center on Mental Health Disorders (Xiangya), China National Technology Institute on Mental Disorders, Hunan Key Laboratory of Psychiatry and Mental Health, Mental Health Institute of Central South University, Changsha, China. 5. College of Information and Intelligent Sci-Tech, Hunan Agriculture University, Changsha, China. 6. Department of Social Psychiatry, the Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China. Electronic address: liangzhou_csu@vip.163.com.
Abstract
OBJECTIVE: A new 15-item version of the positive subscale of Community Assessment of Psychic Experiences (CAPE-P15) has been recently proposed and used to measure psychotic-like experiences. The wide application of this scale is thought to be feasible and cost-effective, due to its manageable length and higher level of internal consistency. However, its psychometric properties have not been well established. METHODS: The validity and reliability of the CAPE-P15 were assessed in 1255 college students across two time frames (over a lifetime and in the past month). Confirmatory factor analysis was used to confirm its construct validity and measurement invariance across sex. Pearson's correlation analysis was used to investigate its clinical and concurrent validity. We also calculated the test-retest reliability and internal consistency to verify the reliability of the scale. Finally, telephone interviews were performed to explore the consistency between self-reported and interview-verified CAPE-P15 scores. RESULTS: The scale has adequate psychometric properties in terms of construct, clinical and concurrent validity; measurement invariance across sex; test-retest reliability; and internal consistency. We also confirmed considerably high consistency between self-reported and interview-verified CAPE-P15 scores. CONCLUSIONS: This study confirms that the CAPE-P15 is a valid and reliable instrument for assessing psychotic-like experiences in college students, both over a lifetime and in the past month. This overall assessment of the CAPE-P15 supports its more widespread use in this population. However, further research is needed to assess its utility in clinical settings, as well as in general population.
OBJECTIVE: A new 15-item version of the positive subscale of Community Assessment of Psychic Experiences (CAPE-P15) has been recently proposed and used to measure psychotic-like experiences. The wide application of this scale is thought to be feasible and cost-effective, due to its manageable length and higher level of internal consistency. However, its psychometric properties have not been well established. METHODS: The validity and reliability of the CAPE-P15 were assessed in 1255 college students across two time frames (over a lifetime and in the past month). Confirmatory factor analysis was used to confirm its construct validity and measurement invariance across sex. Pearson's correlation analysis was used to investigate its clinical and concurrent validity. We also calculated the test-retest reliability and internal consistency to verify the reliability of the scale. Finally, telephone interviews were performed to explore the consistency between self-reported and interview-verified CAPE-P15 scores. RESULTS: The scale has adequate psychometric properties in terms of construct, clinical and concurrent validity; measurement invariance across sex; test-retest reliability; and internal consistency. We also confirmed considerably high consistency between self-reported and interview-verified CAPE-P15 scores. CONCLUSIONS: This study confirms that the CAPE-P15 is a valid and reliable instrument for assessing psychotic-like experiences in college students, both over a lifetime and in the past month. This overall assessment of the CAPE-P15 supports its more widespread use in this population. However, further research is needed to assess its utility in clinical settings, as well as in general population.