Matching Items (6)
Description
Fundamental hypotheses about the life history, complex cognition and social dynamics of humans are rooted in feeding ecology - particularly in the experiences of young animals as they grow. However, the few existing primate developmental data are limited to only a handful of species of monkeys and apes. Without comparative data from more basal primates, such as lemurs, we are limited in the scope of our understanding of how feeding has shaped the evolution of these extraordinary aspects of primate biology. I present a developmental view of feeding ecology in the ring-tailed lemur (Lemur catta) using a mixed longitudinal sample (infant through adult) collected at the Beza Mahafaly Special Reserve in southwestern Madagascar from May 2009 to March 2010. I document the development of feeding, including weaning, the transition to solid food, and how foods are included in infant diets. Early in juvenility ring-tailed lemurs efficiently process most foods, but that hard ripe fruits and insects require more time to master. Infants and juveniles do not use many of the social learning behaviors that are common in monkeys and apes, and instead likely rely both on their own trial and error and simple local enhancement to learn appropriate foods. Juvenile ring-tailed lemurs are competent and efficient foragers, and that mitigating ecological risks may not best predict the lemur juvenile period, and that increases in social complexity and brain size may be at the root of primate juvenility. Finally, from juvenility through adulthood, females have more diverse diets than males. The early emergence of sex differences in dietary diversity in juvenility that are maintained throughout adulthood indicate that, in addition to reproductive costs incurred by females, niche partitioning is an important aspect of sex differential feeding ecology, and that ontogenetic studies of feeding are particularly valuable to understanding how selection shapes adult, species-typical diets. Overall, lemur juvenility is a time to play, build social relationships, learn about food, and where the kernels of sex-typical feeding develop. This study of the ontogeny of feeding ecology contributes an important phylogenetic perspective on the relationship between juvenility and the emergent foraging behaviors of developing animals
ContributorsO'Mara, Michael Teague (Author) / Nash, Leanne T. (Thesis advisor) / Reed, Kaye E (Committee member) / Schwartz, Gary T (Committee member) / Sauther, Michelle L (Committee member) / Arizona State University (Publisher)
Created2012
Description
The research on female juvenile gang members is limited in scope and research has not yet examined mental health issues in this population. This study examines the case histories of 127 female juvenile gang members who were arrested by the Florida Department of Juvenile Justice. To add to the limited gender-specific research on female juvenile gang members, data are presented regarding this population's mental health problems, childhood maltreatment, substance abuse problems, age of contact with the juvenile justice system, and other factors salient to female juvenile gang members' prevention, treatment, and intervention needs. Female juvenile gang members who had a mental health diagnosis were significantly more likely to report childhood maltreatment. Female juvenile gang members who were younger at their age of first arrest were significantly more likely to report chronic substance use. Clinical levels of anger-irritability and depression-anxiety were found for approximately half of female juvenile gang members and suicide ideation was found for approximately one fourth. These findings have important implications for practitioners and gender-specific prevention, intervention, and treatment programs targeted specifically for female juvenile gang members.
ContributorsDowning, Leigh Anne (Author) / Roe-Sepowitz, Dominique (Thesis advisor) / Anthony, Elizabeth (Committee member) / Jackson, Kelly (Committee member) / Arizona State University (Publisher)
Created2012
Description
Background: ACEs has been associated with stress and violence in prior research. More research is needed to set up gender differences between males and females displaying violence and stress in response to ACEs. Objectives: This study investigated the effects of ACEs and gender on exhibited frequencies of violence and stress within youth. Methods: This study used descriptive statistics and regression to examine the relationships between gender and aces on violence and stress using data from the Arizona Youth Survey (AYS). Interactions were included to evaluate if gender moderated the effect of ACEs. Results: Analyses showed that ACEs significantly impacted youths’ engagement in violence and experiences of stress. Additionally, boys engaged in more violence while girls experienced increased stress. Interaction effects were not substantial as compared to the main effects of ACEs and gender. Conclusion: Given the results, youth interventions should focus on the overall impact of ACEs, regardless of gender.
ContributorsPark, Deborah (Author) / Pardini, Dustin (Thesis director) / Fine, Adam (Committee member) / Barrett, The Honors College (Contributor) / School of Criminology and Criminal Justice (Contributor)
Created2023-05
Description
Juvenile delinquency is a complex issue that effects youth, families, and society. Studies have found that parenting styles are a significant contributor to numerous behaviors that influence juvenile delinquency, specifically substance use and poor academic achievement. This literature has been used by to the juvenile justice system to develop family based interventions for delinquent youth in efforts to reduce recidivism. However, previous studies have primarily sampled from the general population, which has limited their usefulness in creating selective interventions for the delinquent population. This thesis offers Baumrind (1966) and Maccoby & Martin's (1983) theory of parenting style typologies as a framework for understanding the effects of parenting style on substance use and academic achievement among delinquent youth. Using juvenile court case files from Maricopa County collected from 2005-2010, (N = 181), logistic regression was performed to test the hypotheses that (1) delinquent youth with Authoritarian, Uninvolved, and Permissive parenting will be more likely to use substances than youth with Authoritative parenting and that (2) delinquent youth with Authoritarian, Uninvolved, and Permissive parenting will be more likely to have poor academic achievement than youth with Authoritative parenting. Using Authoritative parenting as the reference group, it was found that delinquent youth with Permissive and Uninvolved parenting had a higher likelihood of substance use than delinquent youth with Authoritative parenting, and that delinquent youth with Permissive parenting had a higher likelihood of poor academic achievement than youth with Authoritative parenting. These findings have important theoretical implications as well as practical implications for intervention strategies for delinquent youth, which are additionally discussed.
ContributorsPosey, Brianne M (Author) / Rodriguez, Nancy (Thesis advisor) / Burt, Callie (Committee member) / Zatz, Marjorie (Committee member) / Arizona State University (Publisher)
Created2014
Description
General theories of crime have frequently been used to explain a variety of offending and victimization experiences for a wide range of samples. However, feminist criminologists question whether the same causal mechanisms exert similar effects for males and females—a criticism that points to the need for sex-specific analyses. Toward that end, this dissertation examines variables derived from several different general theories of crime in three separate studies. Each of the studies uses split-sample analyses to investigate potential sex-based differences. The first study uses three-level meta-analytic methods to determine if predictor variables derived from general theories explain victimization for both adolescent males (n = 138,848) and adolescent females (n = 176,611). Additionally, it examines both within-dataset and between-dataset differences. The second study uses a sample of high school students in Arizona (n = 2,738 males, n = 2,932 females). It examines the role of parental social ties in explaining the overlap of adolescent dating violence (ADV) offending and victimization. The third study uses two waves of a longitudinal dataset of high-risk adolescents (n = 182 males, n = 203 females). It focuses on the relationship between negative emotions and delinquency, and the role of avoidant coping. In each of the studies, both gender-neutral and gender-specific explanations of offending and victimization were found. In the first study, while predictor variables derived from criminological theory explained victimization for both males and females, larger effect sizes were found for risky lifestyle variables. In the second study, an overlap between ADV offending and victimization was found for both males and females, and social ties explained some of the overlap. However, paternal attachment was only significant for females, and involvement was only significant for males. In the third study, avoidant coping was associated with an increase in substance abuse, and anger was associated with an increase in violent behavior for both males and females. Avoidant coping partially mediated the relationship between anger and substance use, but only for males. Implications for practice and future research are discussed.
ContributorsPusch, Natasha (Author) / Holtfreter, Kristy (Thesis advisor) / Reisig, Mike (Committee member) / Fine, Adam (Committee member) / Arizona State University (Publisher)
Created2020
Description
The purpose of this research was to investigate the effect of the type of crime (namely, its perceived immorality) a juvenile is suspected of on how juvenile suspects are perceived (in terms of moral character, immaturity, and suggestibility) and, in turn, interrogated. I expected act-person dissociation to influence that effect. To that end, perceptions of crime (i.e., immorality, seriousness) were also investigated. The study was first conducted with law enforcement officers (n = 55), then replicated with laypeople (n = 171). Participants were randomly assigned to one of three crime conditions: robbery, sexual assault, and murder. In each condition, participants read a probable cause statement involving a 15-year-old suspect. There were several key findings: (1) Murder was the most serious crime, whereas robbery and sexual assault were more immoral. (2) Act-person dissociation did not occur. (3) Participants were more likely to endorse the use of psychologically coercive tactics on the juvenile suspected of sexual assault than the juvenile suspected of murder. (4) The more favorably participants perceived a juvenile’s moral character, the less likely they were to endorse the use of psychologically coercive interrogation tactics. (4) Participants who more strongly agreed that juveniles are more immature and suggestible than adults were less likely to endorse the use of psychologically coercive tactics, more likely to endorse the use of tactics that encourage compliance with interrogators, and more likely to adhere to the PEACE model of juvenile interrogations. The implications and limitations of these findings are discussed, along with potential directions for future research.
ContributorsFaison, Lakia (Author) / Mickelson, Kristin (Thesis advisor) / Smalarz, Laura (Committee member) / Salerno, Jessica (Committee member) / Arizona State University (Publisher)
Created2021