The new rules of measurement

Article Abstract:

Model-based measurement, called the item response theory (IRT) or latent trait theory has become the theoretical basis for psychological measurement. However, the new rules of measurement are fundamentally variant from the old ones and thus need to be revised. These rules pertain to the standard error of measurement, test length and reliability, interchangeable test forms, unbiased assessment of item properties, meaningful scale scores, and scale properties. However, psychologists lack familiarity with model-based measurement for various reasons.

Measurement, Item response theory

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Convergence of two systems for assessing specific traits of personality disorder

Article Abstract:

A strong convergent and discriminant pattern exists between matched scales of the Schedule for Nonadaptive and Adaptive Personality and the Dimensional Assessment of Personality Pathology-Basic Questionnaire (DAPP-BQ). Analysis of the instruments' structures shows the existence of five factors, four of which correspond to neuroticism, introversion, agreeableness and conscientiousness. All the scales fail to show similar level of convergence.

Testing, Personality disorders

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Psychometric qualities of the German version of the Posttraumatic Diagnostic Scale (PTDS)

Article Abstract:

An evaluation was conducted on the psychometric properties of the German version of the Posttraumatic Diagnostic Scale (PTDS) in a sample of 143 trauma survivors. Item characteristics, sensitivity and specificity indices as well as reliability and validity indicators were obtained as a result of the assessment.

Psychological aspects, Post-traumatic stress disorder

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