Group No. Sex Male/Female Age M (Range) IQ M (SD)
Young WS 44 23/21 11.6 (6-17.1) 54.2 (14.6)
Young DS 69 32/37 11.7 (6-17.1) 52.4 (16.7)
  χ2=0.37; p=0.54 p=0.99 p=0.51
Old WS 41 20/21 24.9 (18-39) 47.6 (9.1)
Old DS 43 29/14 29.9 (18-46) 40.5 (5.7)
  χ2=3.01; p=0.08 p<0.001 p=0.35
WS, Williams’s Syndrome; DS, Down Syndrome; Young, Children and Adolescents; Old, Adults
Table 1: Demographic data of the participants.