Within 3-tier behavioral models, universal interventions are expected to prevent the onset of problem behavior in a majority of children altogether and to sustain improvements in child outcomes by the selected and indicated interventions. A cohort longitudinal design was used to assess the extent to which a 3-tier model achieves these expected…

Two highly contrasting models of preschool education for mildly handicapped children were compared. Direct Instruction led to greater gains on the Test of Early Language Development and the Basic Language Concepts test. Mediated Learning led to greater gains on the McCarthy Verbal and Memory scales and Mean Length of Utterance measure. (Author/VW)