Article 1 PIQ 1 Performance IQ 1 brain damage 1 child 1 clinical assessment 1 computer assisted tomography 1 controlled study 1 female 1 global motion 1 human 1 major clinical study 1 male 1 mathematical model 1 motion defined form 1 motion perception assessment 1 motion speed 1 movement perception 1 nuclear magnetic resonance imaging 1 performance age school child 1 visual impairment 1