مطالب مرتبط با کلید واژه " Psychometrics "


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Validation of a Short Four-Factor Measure of Psychopathy among Iranian University Students

کلید واژه ها: Iran Factor Analysis Psychopathy Antisocial Behavior Psychometrics

حوزه های تخصصی:
تعداد بازدید : ۳۷۱ تعداد دانلود : ۱۶۱
Background: assessment of psychopathy has gained much attention in the past few decades. The four-factor model of psychopathy has proved to be an efficient model for assessment of psychopathy in forensic and non-forensic samples. Several measures have been developed to capture the four-factor model. These four factors are labeled as interpersonal manipulation, criminal tendencies, erratic lifestyle, and callous affect. Research on psychopathy has remained quite limited in Iran. The present study aimed to validate a 20-item measure of psychopathy consistent with the four-factor model of psychopathy. Williams et al. (2007) model and high-loading items were subjected to a Confirmatory Factor Analysis (CFA). Moreover, reliability coefficients and gender differences were evaluated. Methods: a convenience sample of 260 university students was recruited from Tehran, Iran. For each factor, a battery of 5 high-loading items (c.f., Williams et al., 2007) was prepared and translated into Persian following the standard back-translation technique. Of note, item 13 (I enjoy drinking and doing wild things) was altered a little to be consistent with Iranian culture. The response option was provided in a 5-point Likert-type format. Potential participants were approached and invited to take part in a psychological study about social behavior. Descriptive statistics, factor structure, internal consistency, and gender differences were evaluated. Results: item 6 (I’ve stolen a motor vehicle) had the lowest mean while item 13 (I enjoy drinking and doing wild things) had the highest. For interpersonal manipulation, criminal tendencies, erratic lifestyle, and callous affect, the alpha coefficients were 0.55, 0.78, 0.70, and 0.52, respectively. Additionally, the full-scale alpha was 0.79. Goodness-of-fit indices suggested an acceptable fit for the hypothesized four-factor structure of the scale (CMIN/DF = 1.80, RMSEA = 0.056, CFI = 0.90, TLI = 0.88, and GFI = 0.91). An evaluation of gender differences indicated that men had higher scores in all four subscales (0.40 < d < 0.66) as well as the total score (d = 0.76). Conclusion: the present findings supported the factorial validity and internal consistency of the 20-item self-report measure of psychopathy in Iranian university students. Consistent with previous findings, men showed higher psychopathy, as measured by this newly validated measure. This measure could capture the four-factor model of psychopathy. Therefore, this short scale may be used in future psychopathy research in Iran.
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The Development and Psychometric Evaluation of Iranian Coping Style Scale (ICSS): Associations with Individual Differences

تعداد بازدید : ۴۸ تعداد دانلود : ۳۴
Historically, psychologists have been interested in categorizing and measurement of coping styles. Moreover, development of culture-specific measures has been neglected in the coping literature. The present study is intended to develop and validate a parsimonious and broad measure of coping style in Iran. An item pool of 80 items was administered on a random sample of 911 university students in ten groups. A principled components analysis was performed on a subsample and a confirmatory factor analysis was performed on the remaining subsample. Twelve concurrent measures were used to ensure concurrent validity. A principled components analysis suggested a nine-factor solution. A confirmatory factor analysis on a distinct subsample confirmed the nine-factor structure. Subscales were labeled as turning to religion, procrastination, positivity, self-blame, avoidance, seeking social support, problem solving, wishful thinking, and passivity. All subscales were significantly correlated with theoretically related constructs. Alpha coefficients of the subscales ranged from 0.77 (problem solving) to 0.92 (turning to religion). The present study developed and validated the 45-item Iranian Coping Style Scale (ICSS) with nine subscales. Therefore, ICSS may be used as a reliable and valid measure of coping styles in research and clinical settings.