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Objective To examine the intellectual level and structure of children with learning difficulties (LD).Methods 62 children (47 boys,15 girls) with LD and 80 normal children (60 boys,20 girls),aged 6.5-11 years,were administered the Wechsler Intelligence Scale for Children-Chinese Revision (WISC-CR).Results The children with LD had significantly lower IQ scores and subset scores than the control group (P＜0.01).Noticeably,they had lower VIQ than PIQ (P＜0.01).The lowest mean scale scores were on the information,arithmetic,the picture completion and coding,while the highest scores were on the understanding,the putting pieces together and building blocks.Conclusions:IQ is the main factor but not the sole one that affects school record,while VIQ does more.The children with LD have limited acquired knowledge,deficits in the calculating ability,speed and accuracy when doing a job,and relatively good spatial and perceptual organization abilities.
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