German Version and Standardization of the Bayley Scales of Infant and Toddler Development, 3rd Edition: First Results on Clinical Validity and Criteria Validity of the Cognitive Scale and Language Scale

• Published in: Neuropediatrics
• Main Authors: Reuner, G., Rosenkranz, J., Buschmann, A., Bach, C., Pietz, J.
• Format: Conference Proceeding
• Language: English
• Published: 16.04.2015
• ISSN: 0174-304X; 1439-1899
• DOI: 10.1055/s-0035-1548560

Aim: A German adaptation and standardization of the Bayley Scales of Infant and Toddler Development, 3rd Edition, an internationally acknowledged developmental test, has been published recently (Reuner and Rosenkranz 2014). Psychometric properties of the Cognitive Scale and the Language Scale with respect to clinical and criteria validity were reevaluated for this standardization. Methods: To assess clinical validity, 23 children with the diagnosis of trisomy 21 (age at assessment, M = 32.9 months; SD, 6.5), and 53 preterm born infants (gestational age, M = 33.7 weeks; SD, 3.1; corrected age at assessment, M = 25.0 months; SD, 0.7) were examined with the Cognitive Scale and the Language Scale. To assess criteria validity, correlational analyses between test scores and parent report data in the “Parent-based Assessment of the Cognitive Abilities of 2-year-old infants PARCA” (Saudino et al 1998, Übersetzung Reuner 2010) and the “Elternfragebogen zur Früherkennung von Late Talkers SBE-2 KT” (Suchodoletz and Sachse 2008) were performed. Results: Subjects with trisomy 21 showed clearly subnormal scores in both Cognitive Scale (M = 56.9; SD, 7.5) and Language Scale (M = 48.9; SD 5.9). Preterm subjects showed scores in the normal range in both Cognitive Scale (M = 95.0; SD, 16.4) and Language Scale (M = 96.0; SD, 19.9), but mean scores of Cognitive Scale were significantly below those expected in a standardization sample (KS-One-sample-test p  = 0.05). Parent report on language development correlated significantly with the Cognitive Scale ( r  = 0.461, p  < 0.001) and the Language Scale ( r  = 0.673, p  < 0.001), with significantly higher coefficients between SBE-2-KT and Language Scale compared with Cognitive Scale (Fisher z  =  − 2.184; p  = 0.014). Parent ratings in the PARCA correlated significantly only with the Cognitive Scale ( r  = 0.414; p  = 0.002). Conclusion: First analyses underscore clinical and criteria validity for the Cognitive Scale and Language Scale of the German adaptation and standardization of Bayley III Scales. Future analyses, especially for the Motor Scale, are required. Keywords: developmental test, Bayley-III Scales, criteria validity, clinical validity.