Cross-Cultural Adaptation and Psychometric Properties of the Greek Vineland Adaptive Behavior Scales, Second Edition: Parent/Caregiver Rating Form (VABS II-Gr)

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Background: Vineland adaptive behavior scales-parent/caregiver rating form (VABS II) is a questionnaire used to examine adaptive behavior in individuals, whose age ranges from birth to 90 years old. The purpose of this study was to translate and assess the psychometric properties of the Greek version VABS II-parents/caregiver, in children. Method: Three samples of participants within the ages 5 - 10 years were analyzed; including two groups of developmental disorders (N = 116) and control group (N = 90). The questionnaire was translated into Greek by two bilingual translators. The pre-final version was pilot tested in 30 mothers of typical and atypical development children, aged 3 - 10 years. The final version was submitted in 206 subjects, twice, in different ways for reliability testing. A split-half reliability test was employed for the reliability of scores for two halves of the test, to evaluate the reliability and internal consistency, of the VABS II-Gr. The spearman-brown formula was used to determine correlations between the domains. Α known-group method was utilized, to estimate construct validity, exploring the differences between the two groups. Results: Across the age groups, overall, the domain reliability estimates are quite high, with a value of .83 to .95. Equivalence reliability (correlation) was found to be excellent (r = .90). Conclusion: The Greek version of VABS-II is an appropriate scale for assessing adaptive behaviors in a Greek context, as it meets the standard of the original version of VABS. This scale was found to be acceptable, understandable, valid and reliable by Greek parents and may thus be used in cross-cultural clinical practice and research.