Evaluating differential effects using regression interactions and regression mixture models.

Research increasingly emphasizes understanding differential effects. This paper focuses on understanding regression mixture models, a relatively new statistical methods for assessing differential effects by comparing results to using an interactive term in linear regression. The research questions which each model answers, their formulation, and their assumptions are compared using Monte Carlo simulations and real data analysis.

Parental Depressive Symptoms and Adolescent Adjustment: Responses to Children's Distress and Representations of Attachment as Explanatory Mechanisms.

Objective: This study seeks to extend the investigation of parenting as an explanatory mechanism for relations between parental depressive symptoms and adolescent adjustment in the context of a four-wave longitudinal study.

Design: Participants were cohabiting parents and their 320 children (156 boys, 164 girls). Parental depressive symptoms were assessed in kindergarten (T1), parental negative responses to children's emotional distress in first grade (T2), children's representations of attachment with parents in second grade (T3), and adolescent adjustment in seventh grade (T4).

Finite Mixtures for Simultaneously Modelling Differential Effects and Non-Normal Distributions.

Regression mixture models have been increasingly applied in the social and behavioral sciences as a method for identifying differential effects of predictors on outcomes. While the typical specification of this approach is sensitive to violations of distributional assumptions, alternative methods for capturing the number of differential effects have been shown to be robust. Yet, there is still a need to better describe differential effects that exist when using regression mixture models.

Asymmetry in children's salivary cortisol and alpha-amylase in the context of marital conflict: links to children's emotional security and adjustment.

Recent research supports the promise of examining interactive models of physiological processes on children's adjustment. The present study investigates interactions between children's autonomic nervous system activity and adrenocortical functioning in the context of marital discord; specifically, testing models of concurrent responses proposed by Bauer et al. ([2002] Developmental and Behavioral Pediatrics 23:102-113) in the prediction of children's behavioral responses to conflict and adjustment.

Using regression mixture models with non-normal data: Examining an ordered polytomous approach.

Mild to moderate skew in errors can substantially impact regression mixture model results; one approach for overcoming this includes transforming the outcome into an ordered categorical variable and using a polytomous regression mixture model. This is effective for retaining differential effects in the population; however, bias in parameter estimates and model fit warrant further examination of this approach at higher levels of skew. The current study used Monte Carlo simulations; three thousand observations were drawn from each of two subpopulations differing in the effect of X on Y.

Interparental conflict in kindergarten and adolescent adjustment: prospective investigation of emotional security as an explanatory mechanism.

Advancing the long-term prospective study of explanations for the effects of marital conflict on children's functioning, relations were examined between interparental conflict in kindergarten, children's emotional insecurity in the early school years, and subsequent adolescent internalizing and externalizing problems. Based on a community sample of 235 mothers, fathers, and children (Ms=6.00, 8.

Patterns of children's adrenocortical reactivity to interparental conflict and associations with child adjustment: a growth mixture modeling approach.

Examining children's physiological functioning is an important direction for understanding the links between interparental conflict and child adjustment. Utilizing growth mixture modeling, the present study examined children's cortisol reactivity patterns in response to a marital dispute. Analyses revealed three different patterns of cortisol responses, consistent with both a sensitization and an attenuation hypothesis.

Understanding children's emotional processes and behavioral strategies in the context of marital conflict.

Marital conflict is a distressing context in which children must regulate their emotion and behavior; however, the associations between the multidimensionality of conflict and children's regulatory processes need to be examined. The current study examined differences in children's (N = 207, mean age = 8.02 years) emotions (mad, sad, scared, and happy) and behavioral strategies to regulate conflict exposure during resolved, unresolved, escalating, and child-rearing marital conflict vignettes.

Positive Aspects of Fathering and Mothering, and Children's Attachment in Kindergarten.

Past research suggests that maternal and paternal parenting processes differentially contribute to children's adjustment. However, the contribution of paternal warmth and responsiveness, to childhood attachment security is less understood, especially beyond the preschool years. The current study examined relations between parenting and attachment among 236 families with children in kindergarten.