Change in IQ profiles over time Cognitive studies of young children with ASD have generally indicated a significant deficit in verbal compared with nonverbal IQ. However, in older, higher IQ samples, scores for verbal and performance IQ are less discrepant. Other studies have reported significantly higher verbal IQ in this group, especially among individuals with a full scale IQ >100. There is also marked individual variability. For example, among 35 adolescents (mean IQ 111) studied by Ozonoff et al., 42% had a significant VIQ > PIQ discrepancy; in 12% PIQ > VIQ and 46% showed no significant difference.