Conservation of illusion-distorted identity tasks.
Four conservation of illusion-distorted identity tasks were presented to 10 boys ranging in chronological age (CA) from 5-5 to 12, and in mental age (MA) from 3-5 to 10-2, to document individual differences among children with delayed development in acquisition of conservation skills.
D002648:Child; D002657:Child Development; D002675:Child, Preschool; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D007088:Illusions; D007360:Intelligence; D008297:Male; D009903:Optical Illusions; D012858:Size Perception; D014705:Verbal Behavior