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Table 1 Means (and Standard Deviations) scores on demographic and clinical measures for the ASD and Control Groups

From: Adults with autism spectrum disorders exhibit decreased sensitivity to reward parameters when making effort-based decisions

  ASD (n = 20) Control (n = 38) t / χ 2 p
Mean (SD) Mean (SD)
Age 25.95 (7.96) 20.42 (5.64) 2.764 0.01
Verbal IQ 112.50 (14.65) 112.94 (9.94) -0.135 0.89
Performance IQ 113.60 (10.39) 109.17 (9.06) 1.664 0.10
Full Scale IQ 114.70 (11.25) 112.82 (8.66) 0.709 0.48
Handedness (Absolute Value) a 68.55 (24.48) 74.72 (21.00) -1.004 0.32
Right: Left: Ambidextrous 16:1:3 31:2:5 0.038 0.98
Male: Female ratio 17:3 34:4 0.247 0.62
IRB Insistence on Sameness 5.61 (3.85) 1.74 (1.70) 4.082 <0.01
Range 0-14 0-5
IRB Circumscribed Interests 8.17 (2.88) 2.18 (2.05) 8.927 <0.01
Range 4 to 13 0 to 9
IRB Motor Stereotypies 6.06 (3.64) 2.66 (2.39) 3.612 <0.01
Range 0 to 11 0 to 8
ADOS SBRI 1.68 (1.62) N/A N/A N/A
Range 0 to 5
ADOS Communication 3.95 (1.36) N/A N/A N/A
Range 2 to 7
ADOS Social Interaction 8.35(2.70) N/A N/A N/A
Range 4 to 14
  1. aHandedness was indexed with the Edinburgh Handedness Inventory [39]. For each participant, this questionnaire provided handedness as both a continuous value (from −40 to 40, with larger negative values indicating a stronger preference for the left hand and larger positive values indicating a stronger right hand preference) and a categorical value (left-handed: <−40, ambidextrous: ≤-40 and ≤+40, and right-handed: > + 40). The absolute value of handedness is an index of the degree of ambidexterity regardless of right or left hand preference (with values closer to 0 indicating greater ambidexterity). The ADOS was only completed with the ASD group. ADOS, Autism Diagnostic Interview.
  2. IRB = Interview for Repetitive Behaviors.
  3. SBRI, Stereotyped Behaviors and Restricted Interests.