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. Author manuscript; available in PMC: 2015 Aug 22.
Published in final edited form as: Am J Med Genet A. 2015 Apr 21;167(7):1436–1450. doi: 10.1002/ajmg.a.37071

TABLE IV.

Descriptive Statistics for Measures of Vocabulary Ability

Age Group and Measure N Mean Median SD Range
Children
 Peabody Picture Vocabulary Test-4a 63 91.51 95.0 19.73 20 – 120
 Expressive Vocabulary Test-2a 63 87.21 93.0 23.17 20 – 118
Adults
 Peabody Picture Vocabulary Test-4a 11 88.27 90.0 12.02 67 – 107
 Expressive Vocabulary Test-2a 11 88.73 89.0 8.58 79 – 104
a

For the general population, mean = 100 and SD = 15. Lowest possible SS = 20.