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Table 1 Number of participants, age and scores for each measure and time point

From: Non-verbal IQ and change in restricted and repetitive behavior throughout childhood in autism: a longitudinal study using the Autism Diagnostic Interview-Revised

Measure

Age of Dx (T1)

Age 6 (T2)

Age 8

Age 11 (T3)

N

205

199

205

157

Age

3.43 (.75)

6.61 (.33)

8.73 (.21)

10.73 (.21)

ADI-R RRB

4.52 (2.30)

4.07 (2.57)

–

3.66 (2.35)

WISC-IV PRI

–

–

91.28 (19.50)

–

  1. Note. Numbers in parenthesis are standard deviations. Dx = Diagnosis. ADI-R = Autism Diagnostic Interview -Revised. Numbers reported are mean total scores for the RRB domain using current scores. WISC-IV PRI = Wechsler Intelligence Scales for Children- Fourth Edition, Perceptual Reasoning Index. Number reported is the mean Standard Score
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Molecular Autism

ISSN: 2040-2392