Matching Items (47)
Description
Type 1 Diabetes Mellitus (T1DM) is a chronic disease that requires maintaining tight metabolic control through complex behavioral and pharmaceutical regimens. Subtle cognitive impairments and stress response dysregulation may partially account for problems negotiating life changes and maintaining treatment adherence among emerging adults. The current study examined whether young adults with T1DM physiologically respond to psychological stress in a dysregulated manner compared to non-diabetic peers, and if such individuals also demonstrated greater cognitive declines following psychological stress. Participants included 23 young adults with T1DM and 52 non-diabetic controls yoked to T1DM participants based on age, gender, ethnicity, participant education, and maternal education. Participants completed a laboratory-based social stressor, pre- and post-stressor neurocognitive testing, provided fingerstick blood spots (for glucose levels) and salivary samples (for cortisol levels) at five points across the protocol, and completed psychosocial questionnaires. Related measures ANOVAs were conducted to assess differences between T1DM participants and the average of yoked controls on cortisol and cognitive outcomes. Results demonstrated that differences in cortisol reactivity were dependent on T1DM participants' use of insulin pump therapy (IPT). T1DM participants not using IPT demonstrated elevated cortisol reactivity compared to matched controls. There was no difference in cortisol reactivity between the T1DM participants on IPT and matched controls. On the Stroop task, performance patterns did not differ between participants with T1DM not on IPT and matched controls. The performance of participants with T1DM on IPT slightly improved following the stressor and matched controls slightly worsened. On the Trail Making Test, the performance of participants with T1DM was not different following the stressor whereas participants without T1DM demonstrated a decline following the stressor. Participants with and without T1DM did not differ in patterns of performance on the Rey Verbal Learning Task, Sustained Attention Allocation Task, Controlled Oral Word Association Task, or overall cortisol output across participation. The results of this study are suggestive of an exaggerated cortisol response to psychological stress in T1DM and indicate potential direct and indirect protective influences of IPT.
ContributorsMarreiro, Catherine (Author) / Luecken, Linda (Thesis advisor) / Doane, Leah (Thesis advisor) / Barrera, Manuel (Committee member) / Aiken, Leona (Committee member) / Arizona State University (Publisher)
Created2013
Description
Although anxiety may be developmentally appropriate, it can become problematic in some youth. From an ecological perspective, social systems, like family and friendships, are theorized to influence developmental trajectories toward (mal)adjustment, but empirical evidence is scant with regard to the relative impact of subjective satisfaction with family and friendship on anxiety problem development. This thesis study used a subsample of approximately 50% Hispanic/Latino clinic-referred youth (n = 71, ages 6-16 years). Overall, results suggest that the effect of friendship satisfaction on anxiety varied as a function of age but not ethnicity, such that there was a significant negative relationship between child-reported friendship satisfaction and anxiety levels for older children (approx. 9 years and older) but not for younger children. The effect of family satisfaction on anxiety also varied as a function of age, such that older children showed a positive relation between child reported family satisfaction and parent reported anxiety. Furthermore, a positive relation between family satisfaction and anxiety was found only for the H/L children. Post hoc analyses regarding cultural underpinnings of this finding and implications for future research are discussed, as are the results regarding differences between parent and child reports of anxiety.
ContributorsHumphrey, Julia (Author) / Pina, Armando A (Thesis advisor) / Doane, Leah (Committee member) / Bradley, Robert (Committee member) / Arizona State University (Publisher)
Created2013
Description
Despite the compelling nature of goodness of fit and widespread recognition of the concept, empirical support has lagged, potentially due to complexities inherent in measuring such a complicated, relational construct. The present study examined two approaches to measuring goodness of fit in mother-child dyads and prospectively explored associations to mother-child relationship quality, child behavior problems, and parenting stress across the preschool period. In addition, as goodness of fit might be particularly important for children with developmental delays, child developmental risk status was considered as a moderator of goodness of fit processes. Children with (n = 110) and without (n = 137) developmental delays and their mothers were coded while interacting during a number of lab tasks at child age 36 months and during naturalistic home observations at child age 48 months. Mothers and father completed questionnaires at child ages 36 and 60 months assessing child temperamental characteristics, child behavior problems, and parenting stress. Results highlight child-directed effects on mother-child goodness of fit processes across the early child developmental period. Although there was some evidence that mother-child goodness of fit was associated with parenting stress 2 years later, goodness of fit remains an elusive concept. More precise models and expanded developmental perspectives are needed in order to fully capture the transactional and dynamic nature of goodness of fit in the parent-child relationship.
ContributorsNewland, Rebecca Pauline (Author) / Crnic, Keith (Thesis advisor) / Bradley, Robert (Committee member) / Jahromi, Laudan (Committee member) / Millsap, Roger (Committee member) / Arizona State University (Publisher)
Created2014
Description
Research regarding social competence is growing rapidly, but there remain a few aspects of social development that merit more attention. The presented pair of studies were planned to address two such areas in the social development literature, specifically the longitudinal trajectories of social competence and the role of social competence in second language development in language minority (LM) students. The goal of the first investigation was to examine the developmental trends of interpersonal skills (IS) across the early childhood and elementary school years in a nationally representative, U.S. sample. The goal of the second study was to examine whether differing trajectories of IS development in language minority children in the U.S. were related to their language and literacy (LL) skills at grade 5. Both studies utilized data from the Early Childhood Longitudinal Study - Kindergarten Class of 1998-1999 and modeled ratings of children's IS at five time points between fall of kindergarten and spring of fifth grade using latent class growth analyses in Mplus. In study 1, the best model was a quadratic two-class latent class growth analysis. Trajectory class 1 was a higher-level path with a marginally significant non-linear shape and class 2 was a primarily stable, moderate level path with a slight, non-significant increase over time. The same pattern of results emerged for both boys and girls separately as with the combined-sex model, and in all three final models the proportion of the sample in the higher-level class was greater than the moderate-level class. In study 2 a sample of U.S. children whose primary language at home was something other than English was utilized. LL at the start of kindergarten and sex were included as covariates and LL in fifth grade as a distal outcome. The best model for the data was a cubic two-class latent class growth analysis. Class 1 followed a higher-level path with small, incremental change over time and class 2 was a moderate-level path with greater undulation. Both covariates significantly predicted latent class and language and literacy scores at grade 5 differed significantly across classes.
ContributorsDiDonato, Alicia (Author) / Wilcox, M. Jeanne (Thesis advisor) / Bradley, Robert (Committee member) / Wilkens, Natalie (Committee member) / Valiente, Carlos (Committee member) / Arizona State University (Publisher)
Created2014
Description
This study investigated father-child Activation Theory and the impact of activative fathering on children's dysregulation and social skills. The sample followed 145 families of typically developing children across ages 4 to 6. Fathering and mothering behaviors were coded via naturalistic observations at child age 4, children's dysregulation was coded during a laboratory puzzle task at age 5, and children's social skills were rated by parents and teachers at age 6. Results found support for a constellation of activative fathering behaviors unique to father-child interactions. Activative fathering, net of mothering behaviors, predicted decreased behavioral dysregulation one year later. Support was not found for moderation of the relation between activative fathering and children's dysregulation by paternal warmth, nor was support found for children's dysregulation as a mediator of the relation between activative fathering and children's social skills. These results suggest that parenting elements of father-child activation are unique to fathering and may be more broadly observable in naturalistic contexts not limited to play activities alone. Additionally, activative fathering appears to uniquely influence children's self-regulatory abilities above and beyond identical mothering behavior. In the present work, paternal warmth was not a necessary for activative fathering to positively contribute to children's regulatory abilities nor did children's dysregulation link activative fathering to social skills.
ContributorsStevenson, Matthew (Author) / Crnic, Keith (Thesis advisor) / Dishion, Thomas (Committee member) / Bradley, Robert (Committee member) / Eisenberg, Nancy (Committee member) / Arizona State University (Publisher)
Created2014
Description
Methods to test hypotheses of mediated effects in the pretest-posttest control group design are understudied in the behavioral sciences (MacKinnon, 2008). Because many studies aim to answer questions about mediating processes in the pretest-posttest control group design, there is a need to determine which model is most appropriate to test hypotheses about mediating processes and what happens to estimates of the mediated effect when model assumptions are violated in this design. The goal of this project was to outline estimator characteristics of four longitudinal mediation models and the cross-sectional mediation model. Models were compared on type 1 error rates, statistical power, accuracy of confidence interval coverage, and bias of parameter estimates. Four traditional longitudinal models and the cross-sectional model were assessed. The four longitudinal models were analysis of covariance (ANCOVA) using pretest scores as a covariate, path analysis, difference scores, and residualized change scores. A Monte Carlo simulation study was conducted to evaluate the different models across a wide range of sample sizes and effect sizes. All models performed well in terms of type 1 error rates and the ANCOVA and path analysis models performed best in terms of bias and empirical power. The difference score, residualized change score, and cross-sectional models all performed well given certain conditions held about the pretest measures. These conditions and future directions are discussed.
ContributorsValente, Matthew John (Author) / MacKinnon, David (Thesis advisor) / West, Stephen (Committee member) / Aiken, Leona (Committee member) / Enders, Craig (Committee member) / Arizona State University (Publisher)
Created2015
Description
Maternal intrusiveness is an important predictor of child mental health problems. Evidence links high levels of maternal intrusiveness to later infant negativity, and child internalizing problems. However, children also influence the manner in which parents interact with them. For example, infants that show more negative emotionality elicit less positive parenting in their caregivers. Infant affect is also associated with later child internalizing difficulties. Although previous research has demonstrated that maternal intrusiveness is related to infant affect and child internalizing symptomatology, and that infant affect is a predictor of internalizing problems and parenting, no studies have looked at the transactional relations between early maternal intrusiveness and infant affect, and whether these relations in infancy predict later childhood internalizing symptomatology. The present study investigates young children's risk for internalizing problems as a function of the interplay between maternal intrusiveness and infant affect during the early infancy period in a low-income, Mexican-American sample. Participants included 323 Mexican-American women and their infants. Data were collected when the infants were 12, 18, 24, and 52 weeks old. Mothers were asked to interact with their infants in semi-structured tasks, and mother and infant behaviors were coded at 12, 18, and 24 weeks. Maternal intrusiveness was globally rated, and duration of infant negative- and positive affect was recorded. Mother reports of child Internalizing symptomatology were obtained at 52 weeks. Findings suggest that there are transactional relations between early maternal intrusiveness and infant negative affect, while the relations between infant positive affect and maternal intrusiveness are unidirectional, in that infant positivity influences parenting but not vice versa. Further, findings also imply that neither maternal intrusiveness, nor infant affect, influence later toddler internalizing symptomatology. Identifying risk processes in a Mexican-American sample adds to our understanding of emerging infant difficulties in this population, and may have implications for early interventions.
ContributorsRystad, Ida A (Author) / Crnic, Keith A (Thesis advisor) / Enders, Craig (Committee member) / Bradley, Robert (Committee member) / Arizona State University (Publisher)
Created2014
Description
Missing data are common in psychology research and can lead to bias and reduced power if not properly handled. Multiple imputation is a state-of-the-art missing data method recommended by methodologists. Multiple imputation methods can generally be divided into two broad categories: joint model (JM) imputation and fully conditional specification (FCS) imputation. JM draws missing values simultaneously for all incomplete variables using a multivariate distribution (e.g., multivariate normal). FCS, on the other hand, imputes variables one at a time, drawing missing values from a series of univariate distributions. In the single-level context, these two approaches have been shown to be equivalent with multivariate normal data. However, less is known about the similarities and differences of these two approaches with multilevel data, and the methodological literature provides no insight into the situations under which the approaches would produce identical results. This document examined five multilevel multiple imputation approaches (three JM methods and two FCS methods) that have been proposed in the literature. An analytic section shows that only two of the methods (one JM method and one FCS method) used imputation models equivalent to a two-level joint population model that contained random intercepts and different associations across levels. The other three methods employed imputation models that differed from the population model primarily in their ability to preserve distinct level-1 and level-2 covariances. I verified the analytic work with computer simulations, and the simulation results also showed that imputation models that failed to preserve level-specific covariances produced biased estimates. The studies also highlighted conditions that exacerbated the amount of bias produced (e.g., bias was greater for conditions with small cluster sizes). The analytic work and simulations lead to a number of practical recommendations for researchers.
ContributorsMistler, Stephen (Author) / Enders, Craig K. (Thesis advisor) / Aiken, Leona (Committee member) / Levy, Roy (Committee member) / West, Stephen G. (Committee member) / Arizona State University (Publisher)
Created2015
Description
Preschool teachers have the opportunity to facilitate children's play with a variety of classroom activities. Preschool activities can be categorized as masculine, feminine, and gender-neutral based on children's preferences. Understanding how and why teachers facilitate children's play with feminine, masculine, and gender-neutral activities is important because children's engagement in gender typed activities has been linked to cognitive development. The current study extends previous and outdated research on teachers' engagement in gender-typed classroom activities by using a teacher-focal observational coding system and survey data to assess the frequency at which, with whom, and why teachers facilitate feminine, masculine, and gender-neutral activities. Results reveal teachers facilitate gender-neutral and masculine activities more frequently than feminine activities. However, facilitation of these activities is qualified by with whom the teacher interacts and the classroom context. During free play, teachers facilitate gender-typed activities in stereotypic ways, facilitating masculine activities with boys more than with girls and feminine activities with girls more than with boys. Although, during structured settings, teachers do not facilitate masculine and feminine activities at different frequencies. Finally, in both free play and structured settings, teachers' gender attitudes do not seem to be strong predictors of their facilitation of gender-typed and gender-neutral activities with the exception of teachers' facilitation of feminine activities during structured settings. The present findings address important issues in educational and developmental research by investigating teachers' gendered classroom practices.
ContributorsGranger, Kristen L (Author) / Hanish, Laura (Thesis advisor) / Bradley, Robert (Committee member) / Kornienko, Olga (Committee member) / Arizona State University (Publisher)
Created2014
Description
During adolescence, friends are a central part of adolescents' daily lives, they serve as significant sources of emotional support and companionship (Keefe & Berndt, 1996; Way & Robinson, 2003) as well as provide opportunities to negotiate interpersonal conflicts and disagreements (Laursen & Pursell, 2009). This study was designed to examine the nature and correlates of friendships, capturing the multidimensional nature of these relationships. Specifically, three goals were proposed: (a) to use a pattern-analytic approach to identify different profiles of adolescents' friendships along three dimensions: intimacy, negativity, and involvement; (b) to examine linkages between profile membership and adolescents' cultural orientations and values; and (c) to explore the relation between profile membership and adolescent well-being. Participants were 246 Mexican-origin adolescents (M = 12.50 years; SD = 0.58) who participated in home interviews and a series of nightly phone calls. Adolescents reported on their friendship qualities, their cultural orientations and values, as well as their depressive symptoms, risky behaviors, and on their current grades (GPA). Adolescents' time spent with best friends was calculated from the seven nightly phone calls. Results revealed three distinct latent profiles: Positive Engagement, Moderate Engagement, and Low Involvement. Profile membership was not linked to adolescents' cultural orientations and values. Further, associations emerged between profile membership and adolescents' GPA, but not their risky behaviors and depressive symptoms.
ContributorsRodriguez, Sue Annie (Author) / Updegraff, Kimberly (Thesis advisor) / Umana-Taylor, Adriana (Committee member) / Bradley, Robert (Committee member) / Arizona State University (Publisher)
Created2011