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

Abstract

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 knowngroup 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:

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“…The scores are above the critical value of 0.70, which indicates satisfactory indicator reliability (Hair et al, 2019;Sarstedt et al, 2022). The internal consistency is measured with Cronbach's α, which is above the acceptable value of 0.70 (Katsiana et al, 2022;Waldron et al, 2012). The internal consistency has also been measured with composite reliability, whose value lies within the acceptable limits of 0.70 to 0.95 (Jöreskog, 1971).…”