D. Wechsler’s scientific contributions

... Data from digital medical records, in-person assessments and parental interviews were reviewed and analysed. Following a standardised research protocol, the most recent Dutch version of the Wechsler Intelligence Scale for Children -Fifth Edition (WISC-V-NL; [14,50] was [1,42]), resulting in a developmental quotient (DQ), whereas for the subsequent evaluation either the Wechsler Preschool and Primary Scale of Intelligence -Third Edition (WPPSI-III-NL; [15,48]), WPPSI-IV-NL, Wechsler Intelligence Scale for Children -Third Edition (WISC-III-NL; [47]), SON-R or WISC-V were utilised. The most recent IQ assessment was part of the current research protocol, which consisted of the WISC-V (n = 18) or the SON-R (n = 1), as described above. ...

Reference:

Developmental milestones and cognitive trajectories in school-aged children with 16p11.2 deletion