Matching Items (6)
Description
The interplay of genes and environment on children's development is a complex dynamic process. As behavior geneticists begin to model protective as well as risk factors, and interactive as well as main effect influences, development is elucidated. It was hypothesized that positive parenting, a quality home environment, and high family cohesion would moderate the heritability of three components of temperament: Effortful Control, Negative Affectivity, and Extraversion/Surgency. Participants were drawn from the Wisconsin Twin Project and consisted of 1573 twins (51% boys), 88.5% Caucasian, M=7.93 years (SD=0.87). Higher order composites for the parenting and family environment moderators were formed from mother and father reports of Behavior Management Self-Assessment, Child Rearing Practices Report, Family Assessment Device, and Family Conflict Scale. Measures of the home environment (LEOS Living Environment Observation Scale and CHAOS Confusion, Hubbub, and Order Scale) were not composited due to the nature of the variables. Correlational analyses showed a majority of the temperament and environmental measures to be correlated (rs = -.49-.57). For Effortful Control, Negative Affectivity, and Extraversion/Surgency, estimates for the heritability and nonshared environment were 0.60 and 0.40, 0.80 and 0.20, and 0.59 and 0.41, respectively, with no significant main effects of the shared environment. Models incorporating environmental moderation of these estimates yielded parenting as a significant moderator for Negative Affectivity, LEOS for Effortful Control and Extraversion/Surgency, and CHAOS for Effortful Control and Extraversion/Surgency. Results suggest that the quality of the family environment may act as a permissive or determinative influence on the heritability and expression of temperament. Future analyses include the examination of interactive genetic influences. These findings underscore the importance of shared environment, and support the recent literature on the benefits of positive influences on children's development.
ContributorsKao, Karen (Author) / Bradley, Robert H. (Thesis advisor) / Lemery-Chalfant, Kathryn (Thesis advisor) / Nagoshi, Craig (Committee member) / Arizona State University (Publisher)
Created2011
Description
Previous research has indicated that certain breeds of dogs stay longer in shelters than others; however exactly how breed perception and identification influences potential adopters' decisions remains unclear. Current dog breed identification practices in animal shelters are often based upon information supplied by the relinquishing owner, or staff determination based on the dog's phenotype. However discrepancies have been found between breed identification as typically assessed by welfare agencies and the outcome of DNA analysis. In Study 1, the perceived behavioral and adoptability characteristics of a pit-bull-type dog were compared with those of a Labrador Retriever and Border Collie. How the addition of a human handler influenced those perceptions was also assessed. In Study 2, lengths of stay and perceived attractiveness of dogs that were labeled as pit bull breeds to dogs that were phenotypically similar but were labeled as another breed at an animal shelter were compared. The latter dogs were called "lookalikes." In Study 3, perceived attractiveness in video recordings of pit-bull-type dogs and lookalikes with and without breed labels were compared. Lastly, data from an animal shelter that ceased applying breed labeling on kennels was analyzed, and lengths of stay and outcomes for all dog breeds, including pit bulls, before and after the change in labeling practice were compared. In total, these findings suggest that breed labeling influences potential adopters' perceptions and decision-making. Given the inherent complexity of breed assignment based on morphology coupled with negative breed perceptions, removing breed labels is a relatively low-cost strategy that will likely improve outcomes for dogs in animal shelters.
ContributorsGunter, Lisa (Author) / Wynne, Clive D.L. (Thesis advisor) / Bimonte-Nelson, Heather A. (Committee member) / McBeath, Michael K. (Committee member) / Arizona State University (Publisher)
Created2015
Description
Timing performance is sensitive to fluctuations in time and motivation, thus interval timing and motivation are either inseparable or conflated processes. A behavioral systems model (e.g., Timberlake, 2000) of timing performance (Chapter 1) suggests that timing performance in externally-initiated (EI) procedures conflates behavioral modes differentially sensitive to motivation, but that response-initiated (RI) procedures potentially dissociate these behavioral modes. That is, timing performance in RI procedures is expected to not conflate these behavioral modes. According to the discriminative RI hypothesis, as initiating-responses become progressively discriminable from target responses, initiating-responses increasingly dissociate interval timing and motivation. Rats were trained in timing procedures in which a switch from a Short to a Long interval indexes timing performance (a latency-to-switch, LTS), and were then challenged with pre-feeding and extinction probes. In experiments 1 (Chapter 2) and 2 (Chapter 3), discriminability of initiating-responses was varied as a function of time, location, and form for rats trained in a switch-timing procedure. In experiment 3 (Chapter 4), the generalizability of the discriminative RI hypothesis was evaluated in rats trained in a temporal bisection procedure. In experiment 3, but not 1 and 2, RI enhanced temporal control of LTSs relative to EI. In experiments 1 and 2, the robustness of LTS medians to pre-feeding but not extinction increased with the discriminability of initiating-responses from target responses. In experiment 3, the mean LTS was robust to pre-feeding in EI and RI. In all three experiments, pre-feeding increased LTS variability in EI and RI. These results provide moderate support for the discriminative RI hypothesis, indicating that initiating-responses selectively and partially dissociate interval timing and motivation processes. Implications for the study of cognition and motivation processes are discussed (Chapter 5).
ContributorsDaniels, Carter W (Author) / Sanabria, Federico (Thesis advisor) / McClure, Samuel M. (Committee member) / Wynne, Clive D.L. (Committee member) / Olive, Michael F. (Committee member) / Arizona State University (Publisher)
Created2018
Description
The present research expands on prior research that demonstrated a prototypical facial expression in response to cute, baby-like Kindchenschema targets. This expression, referred to as the tenderness expression, is recognizable to onlookers as a response to such stimuli. Across two studies, the current research examined if there were differences in perceptions of trustworthiness (Studies 1 and 2) and willingness to trust (Study 2) toward individuals displaying the tenderness expression as compared to a Duchenne smile or a neutral expression. Results indicate the tenderness expression is associated with lower ratings of trustworthiness relative to a smile, but no differences among the expressions on willingness to trust. Exploratory analyses demonstrate a replicated pattern of differences on the Big Five Personality Inventory among these three expressions. While these findings were not consistent with a priori hypotheses, this research provides further insight into the social implications associated with this tenderness expression.
ContributorsO'Neil, Makenzie J (Author) / Shiota, Michelle N. (Thesis advisor) / Kenrick, Douglas T. (Committee member) / Wynne, Clive D.L. (Committee member) / Bradley, Robert H. (Committee member) / Arizona State University (Publisher)
Created2019
Description
Social-emotional competence (SEC), or effectiveness of social interaction, plays a central role in children’s health and well-being. The three goals of the current study were to describe the development of SEC during a preschool year; identify an appropriate factor structure for observed teacher-child interactions; and predict SEC growth from children’s characteristics (emotional competence, language risk, gender, and race/ethnicity), teacher-child relationship quality, and classroom characteristics (relational climate, observed teacher-child interaction quality, and curriculum). Children’s social competence, anger/aggression, effortful control, and emotion knowledge (N =822) was assessed at three time points during a preschool year via teachers’ reports and behavioral assessments. In the fall, teachers reported the quality of their relationships with children and teacher-child interactions were observed in classrooms. Aim 1 results indicated that children exhibited linear increases in effortful control and social competence and stability in anger/aggression, although social competence was the only construct where linear change varied among children. Due to a lack of longitudinal measurement invariance, growth in latent emotion knowledge could not be evaluated. Several gender and racial/ethnic differences were identified in SEC intercepts, but not the social competence slope. Language risk and impulsivity were consistent predictors of SEC intercepts. Aim 2 results indicated that teacher-child interaction quality was primarily unidimensional. Finally, results from aim 3 indicated that children’s emotional competence at the beginning of the year and classroom relational climate were predictive of growth in social competence. End-of-year social competence levels were associated with supportive teacher-child relationship quality (particularly among girls), high emotional competence, low language risk, and supportive classroom relational climate; girls had higher social competence than boys. Although not directly associated with social competence, observed teacher-child interaction quality was conditionally predictive of the social competence in the context of supportive teacher-child relationships. Further, when observed teacher-child interaction quality was average or high, children with low emotional competence exhibited greater growth in social competence than children with high emotional competence. The results inform our understanding of SEC development, the nature of teacher-child interactions in preschool classrooms serving high-risk populations, and potential school-based mechanisms for promoting social competence.
ContributorsJohns, Sarah Katherine (Author) / Eisenberg, Nancy (Thesis advisor) / Spinrad, Tracy L. (Committee member) / Bradley, Robert H. (Committee member) / Grimm, Kevin J. (Committee member) / Arizona State University (Publisher)
Created2020
Description
Parental psychological control refers to parental behaviors that intrude into children’s and adolescents’ psychological world and prevent youths’ development of independence and autonomy. Although researchers have argued the detrimental role of parental psychological control in various youths’ developmental outcomes, the association between parental psychological control and adolescents’ physical aggression has been studied infrequently. In this study, I performed a secondary data analysis using data from the Parenting Across Cultures study to investigate potential bidirectional associations of maternal psychological control and paternal psychological control with adolescents’ physical aggression across early- to mid-adolescence in Italy, Thailand, Sweden, the United States, and Colombia. Using a traditional cross-lagged panel model and a random-intercept cross-lagged panel model, the results indicated that across countries, adolescents’ physical aggression at Time 1 (approximately 12 years old) positively predicted fathers’, but not mothers’, psychological control at Time 2 (approximately 14 years old). Further, individual and familial factors such as child age, puberty level, and family socioeconomic status (SES) had significant associations with maternal psychological control, paternal psychological control, and adolescents’ physical aggression across countries and time points. No “maternal effect” or “paternal effect” was found of parental psychological control on adolescents’ physical aggression. This study provided novel information suggestive of adolescents’ role in eliciting parental behaviors, especially the responses of fathers. Suggestions for future research were provided to facilitate a better understanding of parental psychological control and child development in cross-country context.
ContributorsXu, Jingyi (Author) / Eggum-Wilkens, Natalie D. (Thesis advisor) / Bradley, Robert H. (Committee member) / Jager, Justin (Committee member) / Spinrad, Tracy L. (Committee member) / Arizona State University (Publisher)
Created2021