Abstract
The age of motor milestone achievement, collected in a prospective fashion during well baby examinations, was compared to the 3 year old Stanford Binet (SB) performance for 213 caucasian children. The population had 109 males and 104 females, was predominantly upper middle class (Hollingshead ≤3 for 205), and included 4 prematures. Mean SB IQ was 114 ±13 with 32 children 100. Milestones included: rolls supine to prone (S to P), sits (alone), crawls and walks. Mean ages of attainment in months and standard deviations are tabled. Milestones were related to SB performance using linear correlation. Pearson's r values are shown. To determine whether significant relationships existed when IQ stratification (IQ<85, 85-100, 101-117, >117) was considered, milestones were regressed on SB groups. The t statistics refer to regression coefficients in this analysis.Significant but modest correlations exist between the ages of motor achievement and SB performance. This also holds when stratifying by IQ subgroups. Brighter children have earlier ages of gross motor achievement; however, this relationship is not strong enough to clinically discern SB subgroups.
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