The dark core of personality is a recent construct that encompasses the malevolent, antagonistic, and aversive side of human nature that represents the common inner core of dark personality traits. The aim of the present study is to develop a short, multidimensional, and invariant version of the dark core of personality D70 measure. Two samples of…

The objective of this study was to create a psychometrically valid and reliable toxic leadership scale (TLS) for use in higher education workplace environments. The TLS was administered to a sample of 482 faculty members employed by three public universities in Jordan. Another aim of the study was to determine the level of toxic leadership based…

A limited number of studies currently exist focusing on comorbid psychopathology of children with autism spectrum disorders (ASDs). Due to the heterogeneity of ASD symptoms, communication deficits, and impairments in intellectual functioning, assessing symptoms of psychopathology is complicated. The "Autism Spectrum Disorders-Comorbidity for…

The aim of this research is to develop the Mobbing Scale and examine its validity and reliability. The sample of the study consisted of 515 persons from Sakarya and Bursa. In this study, construct validity, internal consistency, test-retest reliability, and item analysis of the scale were examined. As a result of factor analysis for construct…

Reliability and construct validity of over 1,000 mothers' responses to the Disruptive Behavior Rating Scale-Parent Version were studied. Results indicated excellent internal consistency and test-retest reliability on three subscales (Oppositional, Distractible, and Impulsive-Hyperactive) but only marginal reliability on the Antisocial Conduct…

The reliability and construct validity of ratings for the Autism Behavior Checklist were examined with a sample of 198 children diagnosed with autistic disorder and conditions often confused with autism. Alpha coefficients for the five scales of the ABC as well as the Total Score were reported and the factor structure of the ABC was examined…

The author explored the underlying dimensions and construct validity of the Bullying Situations Identification Instrument (BSI; Hazler, Miller, Carney, & Green, 2001) using exploratory factor analyses. Three dimensions of bullying severity were found using 251 school professionals as participants. The three factors that emerged from analyses were…

Background: Bullying is a problem in schools in many countries. There would be a benefit in the availability of a psychometrically sound instrument for its measurement, for use by teachers and researchers. The Olweus Bully/Victim Questionnaire has been used in a number of studies but comprehensive evidence on its validity is not available. Aims:…