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. Author manuscript; available in PMC: 2015 Jul 23.
Published in final edited form as: Am J Intellect Dev Disabil. 2011 Jul;116(4):290–304. doi: 10.1352/1944-7558-116.4.290

Table 3.

Demographic Characteristics of the Sample

M SD Range
Chronological age (months) 75.15 23.05 48-129
Mental age (months) 36.57 8.98 24-57
Developmental quotient 50.23 9.95 33-68
N %
Total sample 26
Female 11 42.3
White, Non-Hispanica 20 80.0
Mother ed.: collegeb,c 14 58.3
Father ed.: collegeb,d 15 62.5
a

n = 25.

b

n = 24.

c

Mother's education: number/% who completed college.

d

Father's education: number/% who completed college.