Tokyo Child Development Schedule. I. Test-retest reliability and concurrent validity.

The Tokyo Child Development Schedule (TCDS) consisting of 140 items divided into seven areas--gross motor, fine motor, self-help, play, socialization, speech and comprehension-cognition--was developed. Each item is checked by a caretaker of a child with a three-point scale: pass, sometimes pass and fail. All of the seven areas and the entire portion of the TCDS exhibited a high grade of test-retest reliability. All but two of the items showed good agreement between the results of the two-time ratings. In 53 children with or without autistic features, the total scores on the TCDS and mental ages on the Japanese version of the Stanford-Binet Intelligence Scale demonstrated the value of correlation coefficient (r) of 0.779.