Hierarchical data are becoming increasingly complex, often involving more than two levels. Centering decisions in multilevel models are closely tied to substantive hypotheses and require researchers to be clear and cautious about their choices. This study investigated the implications of group mean centering (i.e., centering within context; CWC) and grand mean centering (CGM) of predictor variables in three-level contextual models. The goals were to (a) determine equivalencies in the means and variances across the centering options and (b) use the algebraic relationships between the centering choices to clarify the interpretation of the estimated parameters. We provide recommendations to assist the researcher in making centering decisions for analysis of three-level contextual models.

The study examined the unique relationship between multiple dimensions of classroom behavioral adjustment problems and salient social-emotional competencies for urban Head Start children. These relationships were investigated using a hierarchical model that controlled for the variance in social-emotional outcomes attributed to age, gender, and verbal ability. Classroom behavioral adjustment problems were assessed early in the year by the Adjustment Scales for Preschool Intervention (ASPI) across multiple, routine preschool classroom situations. Outcomes assessed at the end of the year included emotion regulation, peer play in the home and neighborhood context, and approaches to learning. Socially negative behavior in the classroom predicted emotional lability, maladaptive learning behaviors, and disruptive social play in the home at the end of the year. Withdrawn behavior uniquely predicted lower affective engagement in the classroom and disconnection from peers in the home context. Findings provide predictive validity for the ASPI. Implications for policy, practice and future research are discussed.

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This study employed a developmental-ecological approach to investigate the relationship across the school year between early problems in preschool classroom situations and a comprehensive set of readiness competencies for urban, low-income children. Study I identified three reliable and unique underlying classroom situational dimensions where behavior problems occurred: Structured Learning, Peer Interaction, and Teacher Interaction situations. Boys and younger children evidenced more problematic behavior across all situations. Study II investigated the relationship between early problems in the situations and readiness outcomes. Early situational difficulties uniquely and differentially predicted lower peer social and classroom learning outcomes. In combination, both the type of behavior problem (what) and the situational problem (where) explained greater variance in the prediction of readiness outcomes, contributing to a more comprehensive understanding of developmental trajectories.