Abstract
There is mixed evidence about the predictive validity of the Griffiths mental developmental scales. This study aimed to assess the predictive value of developmental assessments of children in their second year using the Griffiths mental development scales for neuro-developmental status at five years using the Wechsler preschool and primary scale of intelligence, revised (WPPSI-R). In a longitudinal study 253 children were assessed in their second year of life using the Griffiths scales and again at five years using the WPPSI-R. The scores were compared and the predictability of the WPPSI-R outcome on the basis of Griffiths scores was assessed. The WPPSI-R full scale IQ and the performance IQ at age five could be predicted moderately by the Griffiths general quotient (GQ) and by the personal/social scale. The Griffiths GQ was not a significant predictor of verbal IQ at age 5. The Griffiths performance scale predicted subsequent WPPSI-R performance IQ, and marginally the Full Scale IQ. For the early identification of children at risk for language delay, the Griffiths scales may not be suitable. However, a shortened form would be useful to predict overall cognitive development from the second year to school entry, focussing on the personal-social and performance scales.
Highlights
Materials and Methods(mean 100.5, s.d. 15.6); personal-social development; locomotor development; perform
Ing the WPPSI-R verbal IQ, performance IQ and full scale IQ scores from Griffiths general quotient (GQ) scores and to indicate the variance in WPPSIR IQ explained by the Griffiths GQ
When trying to predict the subsequent WPPSI-R scores at age 5, the Griffiths scale, completed during toddlerhood at an age when language was only just emerging (17 months), has a significant predictive power for performance IQ and full scale IQs but not the verbal IQ. This suggests that there is less predictive power for this age group in the Griffiths items from the hearing and speech scale that revolve around language-based tasks that are similar to the WPPSI-R verbal IQ score
Summary
(mean 100.5, s.d. 15.6); personal-social development (mean 100.3, s.d. 16.2); locomotor development (mean 100.4, s.d. 16.3); perform-. Procedure ance tests (mean 99.8, s.d. 17.2) It has been known for some time that At the original assessment[8] and at follow- The WPPSI-R10 provides a full scale IQ the commonly used developmental up,[9] the children were assessed by a single (mean 100, s.d.15) derived from 10 sub-test scales for infants In their second year (mean age scores, grouped into verbal (5 tests) and pertal scales[1] and the Griffiths scales2) have some 17.3 months) all children were assessed by a formance (5 tests) and both verbal and perability to predict skills at a later age, they are paediatrician.
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