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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Psychol Assess. 2015 Aug 24;28(4):429–442. doi: 10.1037/pas0000186

Table 2. Demographic Characteristics by Age Group.

Characteristic Adults Young Adults Late Adolescents Early Adolescents Children Total
Total N 471 844 353 311 229 2208
Sex
 Male 238 291 153 65 90 837
 Female 233 553 200 246 139 1371
Ethnicity
 White 469 604 282 241 138 1734
 African American 0 58 45 16 49 168
 Asian 1 131 2 8 3 145
 Other 1 51 24 46 39 161
Age (years)
 Mean 36.04 19.30 14.48 12.26 8.83
 Standard Deviation 3.90 1.01 0.59 0.85 1.12
Institution
 Stanford University - - 63 121 58 242
 Stony Brook University - - 27 76 38 141
 University of Pittsburgh - 599 15 17 5 636
 Washington University 5 245 248 97 128 723
 Western University 466 - - - - 466

The total sample size (Total N) for each age group is presented here as well as counts for each age group split by sex, ethnicity, and institution where the data was collected. We also present the mean and standard deviation of the age of participants (in years).