OBJECTIVE: To quantify practice effects associated with annual administrations of WISC-R and WAIS-R in children and adolescents with and without hemophilia. METHODS: Participants were young men (age: 7-19; 80 with hemophilia, 30 siblings) enrolled in the Hemophilia Growth and Development Study. Participants with hemophilia completed age-appropriate Wechsler scales at baseline and at four annual follow-ups; the siblings, at baseline and one 2-year follow-up. Regression analyses were used to quantify average changes in scores, adjusting for variables related to test performance. RESULTS: Consecutive annual evaluations were free of significant practice effects for 4 years with the Verbal Scale and for 2 years with the Performance Scale. VIQ decreased, and PIQ increased over time. Baseline VIQ was related to changes in VIQ; baseline PIQ and number of test-specific retests were related to changes in PIQ. CONCLUSIONS: The findings support use of Wechsler scales for annual evaluations to monitor cognitive development in children and adolescents.
OBJECTIVE: To quantify practice effects associated with annual administrations of WISC-R and WAIS-R in children and adolescents with and without hemophilia. METHODS:Participants were young men (age: 7-19; 80 with hemophilia, 30 siblings) enrolled in the Hemophilia Growth and Development Study. Participants with hemophilia completed age-appropriate Wechsler scales at baseline and at four annual follow-ups; the siblings, at baseline and one 2-year follow-up. Regression analyses were used to quantify average changes in scores, adjusting for variables related to test performance. RESULTS: Consecutive annual evaluations were free of significant practice effects for 4 years with the Verbal Scale and for 2 years with the Performance Scale. VIQ decreased, and PIQ increased over time. Baseline VIQ was related to changes in VIQ; baseline PIQ and number of test-specific retests were related to changes in PIQ. CONCLUSIONS: The findings support use of Wechsler scales for annual evaluations to monitor cognitive development in children and adolescents.
Authors: Edith V Sullivan; Wesley K Thompson; Ty Brumback; Devin Prouty; Susan F Tapert; Sandra A Brown; Michael D De Bellis; Kate B Nooner; Fiona C Baker; Ian M Colrain; Duncan B Clark; Bonnie J Nagel; Kilian M Pohl; Adolf Pfefferbaum Journal: BMC Med Res Methodol Date: 2022-06-24 Impact factor: 4.612
Authors: Edith V Sullivan; Ty Brumback; Susan F Tapert; Devin Prouty; Rosemary Fama; Wesley K Thompson; Sandra A Brown; Kevin Cummins; Ian M Colrain; Fiona C Baker; Duncan B Clark; Tammy Chung; Michael D De Bellis; Stephen R Hooper; Bonnie J Nagel; B Nolan Nichols; Weiwei Chu; Dongjin Kwon; Kilian M Pohl; Adolf Pfefferbaum Journal: Dev Cogn Neurosci Date: 2017-01-24 Impact factor: 6.464
Authors: Jolanda C Naafs; Jan Pieter Marchal; Eric Fliers; Paul H Verkerk; Michiel A J Luijten; Anita Boelen; A S Paul van Trotsenburg; Nitash Zwaveling-Soonawala Journal: J Clin Endocrinol Metab Date: 2021-03-08 Impact factor: 5.958