This study examined the reliability and validity of the Preschool Play Scale (PPS), a measure of the developmental level of play, on a sample of 60 handicapped children. Results demonstrated acceptable reliability and validity for the scale as a whole. However, the need for some refinement of the scale was revealed by the findings. Categories of play that can be observed only infrequently need to be reconsidered. The data also suggest that the criteria for deciding whether a behavior is absent or whether there was no opportunity to observe the behavior need to be spelled out more clearly for the scale.

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