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Daycare Effects on Preschool <br /> 7 <br /> (1) EXPERIMENTAL: children randomly assigned to attend the university-based <br /> daycare center (n=61), <br /> (2) C O M M U NIT Y:12-52:children randomly assigned to control group with 12 to 52 <br /> months of daycare experience at corn m unity Title X X <br /> daycare centers (n=41). <br /> (3) CO M M U NIT Y:0-11: children randomly assigned to the control group with less <br /> than 12 months of daycare experience at corn m unity Title <br /> X X daycare centers (n=19). <br /> The age of entry to daycare and the number of months of daycare experience tend <br /> to be confounded among children who had attended a co m m unity daycare for more than <br /> nine months. These children typically had an uninterrupted daycare experience from the <br /> time they first began daycare until they entered kindergarten (89% of children attending <br /> corn m unity daycares and 100% of children attending university daycare). However about <br /> half of the children with less than one year of daycare had sporadic attendance histories <br /> Data Analysis <br /> A repeated-measures multivariate analysis of variance was performed to determine <br /> if there were group, time, or group * time effects on the preschool intellectual <br /> development. A cubic polynomial growth curve model was fit to the data. The cubic <br /> model was selected so that all higher-order terms were excluded to increase the power of <br /> the analysis (Bock, 1979). Three a priori between-groups contrasts were selected for <br /> further exa m ination: <br /> (1) comparison of the experimental subjects with the control subjects <br /> (EXPERIMENTAL vs the two COMMUNITY groups), <br /> (2) comparison of children who attended the university daycare center for most of <br /> their preschool years with children who attended other corn m unity daycare <br /> centers for at least one of their preschool years (EXPERIMENTAL vs <br /> COMMUNITY:12-52), <br /> (3) comparison of control children with less than 12 months of Title X X daycare <br /> with control children who had attended Title X X daycare centers for 12-52 <br /> months (COMMUNITY:O-11 vs. COMMUNITY:12-52). <br />