Skip to main content

Table 5 Study 3 feasibility, convergent validity, and discriminant validity

From: The NIH Toolbox Cognitive Battery for intellectual disabilities: three preliminary studies and future directions

  Feasibility (% valid) Convergent validity Discriminant validity
  ID combined
(study 3)
Age 3–15, general populationa ID combined (study 3) Age 3–6, general populationa ID combined (study 3) Age 3–6, general populationa
DCCS 72.2 % 79.8 % −.51* .69*** .65*** .79***
    KiTAP flexibility errors WPPSI-III block design PPVT-4
Flanker 77.8 % 83.7 % −.61*** .60*** .61*** .67***
    KiTAP distractibility WPPSI-III block design PPVT-4
Picture vocabularyb 100.0 % 83.7 % .92*** .90*** .53*** .53***
    PPVT-4 Leiter-R forward + Spatial memory z score BVMT-R + RAVLT
Oral readingb 94.4 % 98.1 % 91*** .96*** .56*** .53***
    WJ-4 letter/word ID WRAT-IV Leiter-R forward + Spatial memory z score BVMT-R + RAVLT
Picture sequence memory 88.9 % 98.1 % .57*** .50*** .64*** .58***
    Leiter-R forward + Spatial memory NEPSY-II sentence repetition PPVT-4
Pattern comparison 66.7 % 94.4 % −.40 .43*** .49** .44***
    KiTAP go/no-go median RT WPPSI-III processing speed PPVT-4
List sorting 52.8 % 95.7 % .76*** .57*** .76*** .63***
    SB-5 verbal WM NEPSY-II sentence PPVT-4
  1. Validity data shown are Pearson’s correlations
  2. *p < .05; **p < .01; ***p < .001
  3. aZelazo and Bauer [59]
  4. bEstimates reported for the general population are aggregated across the entire child and adolescent sample ranging from 3 to 15 years old