This paper deals with two fundamental problems that are embedded in the evaluation of school practices: (1) attributing value to outcome measures, and (2) attributing outcomes to particular practices. Ways of generating evidence regarding the value of an outcome are discussed, particularly longitudinal research that clarifies the causal relations…

This paper, part of an evaluation of the early intervention project at the Frank Porter Graham Child Development Center, deals primarily with results of the Bayley Mental Development Index (MDI). The MDI was administered to experimental and control infants from lower socioeconomic background at 6, 12 and 18 months of age. Results (discussed in…

This study represents a continuation of a longitudinal assessment of the effectiveness of a Montessori and Responsive Environment preschool program sponsored by the Arlington Public Schools. The Metropolitan Readiness Test, the Caldwell Cooperative Preschool Inventory, and the Peabody Picture Vocabulary Test were used to assess the academic…