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Alternations Of Nmda And Gabab Receptor Function In Development: A Potential Animal Model Of Schizophrenia, Monica Bolton

UNLV Theses, Dissertations, Professional Papers, and Capstones

Schizophrenia is a debilitating mental disorder that affects up to 3% of the world population. The behavioral symptoms are categorized into positive and negative symptoms, which appear during late adolescence/early adulthood. Unfortunately, the underlying cellular and molecular mechanisms of the disease are poorly understood. Several hypotheses exist to explain mechanisms contributing to these behavioral alterations. One model proposes that a reduced function of the NMDA glutamate receptor on specific GABAergic interneurons may be responsible for deficits in schizophrenia. Post-mortem investigations provide evidence of reductions in both glutamate and GABA-related proteins in patients with schizophrenia. Further, GABAergic interneurons that are activated …

Examining Trajectories Of Maternal Depressive Symptoms In Relation To Infant Affect Expression, Katherine Guyon-Harris

Master's Theses and Doctoral Dissertations

Research has shown that maternal depression can have serious physical health effects on the developing fetus as well as later cognitive, behavioral, and affective problems in children. One area of clinical significance is the effect of maternal depression across time, including the differential effects of depression on early child development during the transition to motherhood. The present study explored trajectories of maternal depression from pregnancy through 2 years postpartum and their relation to infant affect expression. Data for the study were collected as part of a larger 5-panel longitudinal study on women’s transition to motherhood. The present study will use …

Infant Perceptions Of Mixed-Race Faces: An Exploration Of The Hypodescent Rule In 8.5 Month-Old Infants, Sophie Beiers

Pitzer Senior Theses

Studies have shown that adults often categorize mixed-race individuals of White and non-White descent as members of the non-White racial group, an effect said to be reminiscent of the “hypodescent” or “one-drop rule.” This effect has not yet been thoroughly studied in infants, although 9-month-old infants have been shown to be able to categorize mono-racial faces into different racial groups. In the present study, the perception of mixed-race White and Asian/Asian American faces was studied in sixteen 8.5-month-old infants. The infants were randomly assigned to two stimulus groups. The stimuli were the photographed faces of female college students who had …

Emerging Adults : Analysis Of Learning Patterns In Collegiate Classrooms, Joan Ann Swanson

Legacy Theses & Dissertations (2009 - 2024)

Emerging adults, who are transitioning from adolescence to adulthood, often spend a significant amount of time on college campuses preparing for their future endeavors. Today's educator is facing many options for addressing the educational needs of their students, as well as a myriad of learning resources and tremendous advances in technology. Their emerging adult students are dealing with multiple distractions, adjustments and transitions. This study examined preferred emerging adult learning styles in light of an information processing framework using grounded theory qualitative analysis. The study also explored students' reported preferences for optimal learning experiences and engagement within the collegiate classroom, …

The Relationship Between Preterm Birth, Temperament, And Psychopathology, Renata Vaysman

Legacy Theses & Dissertations (2009 - 2024)

The survival rates of preterm children have improved dramatically since the advent of new technologies and medical treatments. However, the long term behavioral implications of preterm birth are still being investigated. The current study sought to explore the relationships between birth status (preterm or full term), temperament, and psychopathology. A sample of preterm children and their parents, as well as a sample of age-matched controls and their parents, were recruited for participation in this study. The former group was recruited for participation through a local hospital while the latter group was recruited through flyer distributions in several local school districts. …

Towards Integration: An Autoethnography On The Development Of Identity, Kanchana Henrich

Creative Arts Therapies Theses

This thesis is an autoethnography that explores my own experience of identity development. The intention of this research was to try and find an answer as to why I have not yet been able to develop a cohesive sense of self, in which I am able to accept and embody all of my seemingly disparate parts. I have thus far in my life felt scattered, and unable to accept both the cultures into which I was born, as well as the cultures to which I am organically drawn. Through introspection, reflective writing, and interviewing family members, I have been able …

Rule-Based Category Learning In Children: The Role Of Inhibitory Control, Rahel R. Rabi

Electronic Thesis and Dissertation Repository

The present study examined category learning in relation to inhibitory control and working memory in children and adults. Results revealed that categorization performance improved with age. Young children struggled with rule learning, many older children were successful at rule learning, and most adults had no difficulty with the task. Model-based analyses suggested that performance differences were due to young children’s inability to inhibit the salient, but irrelevant rule. Interestingly, when the analyses focused only on older children and adults who used the task appropriate strategy, the age-related rule-based deficit disappeared. Also, results revealed that successful performance on the categorization task …

The Effects Of Neonatal Immune System Activation With Lipopolysaccharide On Adolescent And Adult Anxiety Behaviours In Male And Female Rats, Alina Zaltzman

Electronic Thesis and Dissertation Repository

The present study examined the effects of neonatal (postnatal days 3 and 5) acute immune system activation with lipopolysaccharide (LPS) on adolescent and adult anxiety behaviours. The major findings suggest that neonatal LPS does not have general long-lasting effects on adolescent anxiety and locomotor behaviours. Rather, early endotoxin treatment has highly specific effects on certain anxiety behaviours that vary depending on the development period. Moreover, neonatal LPS does not seem to influence adult voluntary and non-voluntary locomotor activity or anhedonia, independent of, or in response to, an adult immune challenge. Finally, sex differences were observed in various responses in adulthood, …

Language Brokering A Dynamic Phenomenon: A Qualitative Study Examining The Experiences Of Latina/O Language Brokers, Adriana Esquivel

Scripps Senior Theses

Language brokers are children of immigrants who use their skills as bilinguals to interpret or translate for their family and/or community members. Although language brokering may begin in childhood or preadolescence, language brokering may continue until adulthood. While there are a small number of studies that have touched upon change over time, this study’s primary focus is on language brokers’ experiences relating to change over time. This was accomplished through semi-structured in depth retrospective interviews among Latina/o young adults attending small liberal arts colleges. Three aspects of language brokering were examined, the practice of language brokering, feeling towards language brokering, …

The Intersection Of Multiple Oppressed Identities: Implications For Identity Development, Angela Marie Enno

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Understanding the experiences and identity development of ethnic minority LGBTQ (lesbian, gay, bisexual, transgender and queer or questioning) individuals presents a challenge because the theories of identity development that exist to date may not take into account their unique perspectives. Theories of identity development that are not specific to ethnic minority or LGBTQ identities may not represent their experiences well. At the same time, theories of ethnic identity development may not fit for individuals who are LGBTQ; and theories of LGBTQ identity development may not fit for ethnic minorities. No theory of identity development to date takes into account all …

The Multi-Scale Dynamics Of Executive Function, Jason Anastas

Master's Theses

Cognitive control is a central issue in developmental psychology. Traditional theories of psychology solve this problem by positing a top-down central executive, which coordinates cognitive resources in pursuit of goals. We propose an alternative explanation: cognitive control arises from physical interactions across many different timescales within the system. College and preschool aged participants were asked to complete a simple executive function task, card sorting. We found that multi-scale physical interactions differed depending on experimental constraints, and that executive function in these cases was driven primarily by flexibility in multi-scale interactions, rather than the dominance of one scale. This suggests that, …

Relationships Among The Behavioral Inhibition System, Response Inhibition, Heart Rate Variability, And Anxiety Sensitivity Between Older Adolescents With And Without Significant Anxiety, Erin Tarcza Reuther

LSU Doctoral Dissertations

Differences in the Behavioral Inhibition System (BIS; Gray, 1982), response inhibition, and cardiac vagal control are evident between individuals with anxiety and nonclinical control participants. In this study, the role of inhibition in anxiety was examined, as well as relationships between the primary indexes of inhibition including the behavioral inhibition system (BIS), response inhibition, and cardiac vagal tone (or heart rate variability) at rest and during tasks of response inhibition. Additionally, anxiety sensitivity, an established risk factor for developing anxiety disorders, was examined and how it relates to indexes of inhibition. As expected, inhibition and anxiety sensitivity were found to …

Children's Reinforcement-Induced Suggestibility: Its Developmental Trajectory And Relation To Individual Differences, Elizabeth Rose Uhl

Open Access Theses & Dissertations

Research has shown that reinforcement by interviewers can lead children to make false allegations of wrong doing (e.g., Garven, Wood, & Malpass, 2000). The current study examined the developmental trajectory of reinforcement-induced suggestibility and its relation to individual differences among children. Forty-eight kindergarteners, 52 second graders, and 54 fourth graders viewed a science demonstration by a young man introduced as "Paco Perez." One week later they were interviewed about the visit with misleading questions that suggested Paco had engaged in wrongdoing. Half of the children were interviewed using reinforcement; the other half did not receive reinforcement. Two weeks after Paco's …

The Role Of Racial Information In Infant Face Processing, Angela Nicole Hayden

University of Kentucky Doctoral Dissertations

The present research addressed the development of specialization in face processing in infancy by examining the roles of race and emotion. An other-race face among own-race faces draws adults’ attention to a greater degree than an own-race face among other-race faces due to the “other-race” feature in other-race faces. This feature underlies race-based differences in adults’ face processing. The current studies investigated the development of this mechanism as well as the influence that this mechanism has on emotion processing in infancy.

In Experiment 1, Caucasian 3.5- and 9- month-olds exhibited a preference for a pattern containing an Asian face among …

Developmental Variation In Children's Acquisition Of Metrical Structure: How Early Treatment Of Stressless Syllables Can Inform Phonological Theory, Clifford S. Jones

Open Access Theses & Dissertations

The present study uses 26 color photos to elicit a total of 14 words conforming to a very specific pattern: a stressless syllable word-initially, followed by a stressed syllable, and at most one more stressless syllable. This was found to be a particularly difficult metrical structure for the two- and three-year old participants to produce in an adult-like manner. Based on the findings that a fairly reliable (if language-particular) order of acquisition is observable for contrasts of both place and manner of articulation, the case is made for a system of six emergent features, which may be characterized as combinable …

The Development And Long-Term Influences Of Attachments As Seen Through Attachment Theory: The Influence Of Attachment On Homosexual Males, Christian Alvarez

CMC Senior Theses

This paper seeks to explore the development of attachments in humans as seen through Bowlby's (1980) attachment theory. Components of the theory which focus on how attachments are formed and how they influence future behavior are explored. These are used to then examine how attachment theory applies to the attachment patterns seen in homosexual males.

The Role Of The Socio-Cultural And Developmental Context On Special Education, Amanda Lam

CMC Senior Theses

Existing research on inclusive education deals primarily with the effectiveness of inclusion programs and the theoretical frameworks behind their limitation. However, no extensive research has been conducted that explores the role of the socio-cultural context and the development level in determining the best way in which the educational needs of children with special needs can be met. Recognizing that the effectiveness of different special education services may depend on the socio-cultural context as well as the development level, this literature review seeks to identify the ideal method of treating children with disabilities in developed and developing countries. By assessing the …

Cell Phone Use And Psychosocial Development Among Emerging Adults, Torrey B. Morrill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The cell phone has rapidly become an integral, and, for some, an essential communication tool that is being used worldwide. With cell phone ownership becoming so widespread, especially among the younger generation, society is starting to see and question the impacts of cell phone use on adolescent development.

Relations between cell phone possession, cell phone use, and psychosocial and identity development were investigated using Erikson's Psychosocial Theory and Marcia's Adolescent Identity Paradigm. A sample of 705 college students, ages 18-24, completed a questionnaire that measured the amount and type of cell phone use, identity development (Extended Objective Measure of Ego …

The Epistemic Qualities Of Quantum Transformation, Jonathan Edward Skalski

Theses and Dissertations

Growth and development are central constituents of the human experience. Although the American Psychological Association aims to understand change and behavior in ways that embrace all aspects of experience (APA, 2008), sudden, life-altering or quantum transformation has been disregarded throughout the history of psychology until recently (see Miller & C' de Baca, 1994, 2001). Quantum transformation is similar to self-surrender conversion (James, 1902), but different from peak experiences (Maslow, 1964) and near death experiences (Lorimer, 1990) because quantum transformation, by definition, involves lasting change. Quantum transformation contains epistemic qualities, which refer to the content and process of knowing (Miller & …

A Qualitative Inquiry Of Conceptualized Heterosexuality And Its Influence On The Counseling Process, Breyan N. Haizlip

Counseling & Human Services Theses & Dissertations

With CACREP's increasing attention to majority cultural group memberships and its influence on trainee self-awareness and the counseling relationship (see CACREP 2001/2009), heterosexually-identified counselors have little or no opportunity to increase awareness of their own sexuality, creating challenges when working with clients of various sexual identities. The purpose of this article is to present a qualitative analysis of conceptualized heterosexuality and its influences on the counseling process. A model of the process by which heterosexually-identified counselors conceptualize their heterosexual identity and its influences the counseling process is proposed. Results suggest that providing counselor trainees an opportunity to explore the relationship …

Characterization Of The Behavioral And Neurochemical Effects Of Nicotine Withdrawal In Adolescent And Adult Rats., Luis Alberto Natividad

Open Access Theses & Dissertations

Previous studies have demonstrated that the behavioral effects of nicotine withdrawal are lower in adolescent versus adult rats. However, the neurochemical mechanisms that mediate these developmental differences are presently unclear. Much work has shown that nicotine reward is mediated via enhanced dopamine neurotransmission in the mesolimbic pathway which originates in the ventral tegmental area (VTA) and terminates in several forebrain structures including the nucleus accumbens (NAcc). More recently, studies have shown that nicotine withdrawal produces a decrease in NAcc dopamine transmission, an effect that is believed to serve as a neurochemical marker of withdrawal in adult rodents. The goal of …

Processes Of Disposition Development In K--5 Teachers, Deborah A. Obara

UNLV Theses, Dissertations, Professional Papers, and Capstones

Educators concur that teacher competency requires more than teaching knowledge and skills; competency requires appropriate professional dispositions. The development of professional dispositions is an expected outcome of teacher education programs. Since 2002, program accreditation has been contingent on documentation that prospective teachers have met national standards for dispositions. The body of educational research on disposition assessment has been growing. Research on disposition learning and development, however, has been impeded by the prevailing conceptualization of dispositions as fixed traits resistant to change. The present study conceptualized dispositions as malleable constructs within a theoretical framework that synthesized a cognitive model of thinking …

Developmental Trajectory Of Aggressive Behavior In Clinically Referred Boys: A Rasch Analysis, Scott Lafond

Electronic Theses and Dissertations

A majority of research investigating aggression and its development in children has relied upon the use of rating scales such as the Child Behavior Checklist (CBCL). These scales are typically developed using a conventional factor analytic approach for the selection and retention of scale items, but may not contain sufficient numbers of items to adequately assess the unidimensional construct or developmental trajectory of aggressive behavior in youths. The present study evaluates specific psychometric properties of CBCL Aggressive and Delinquency Problems clinical syndrome scale items to determine the degree to which they reflect the breadth and established developmental trajectory of aggressive …

The Developmental Continuity Of A Cognitive Model Of Worry, Kimberly Rae Zlomke

LSU Doctoral Dissertations

Research on the construct of worry has increased dramatically in the past two decades. This research has also tended to focus on adults, with only a limited number of studies examining adolescent populations. With the continued dominance of developmental psychopathology and a lifespan approach to development, it has become apparent that downward extensions of adult models of psychopathology are inadequate (cf. Mash & Dozois, 2002). As a result, investigations in adolescents are essential due to the potential developmental differences and heterotypic continuity in worry between adolescents and adults. These developmental differences and changes associated with the period of adolescence may …

A 17-Year Longitudinal Study Of Spiritual Development And Psychological Correlates In A Sample Of College Students, Jeremy Daniel Bartz

Theses and Dissertations

In 1984, 1987 and 2001 data were collected on a religiously devout group of college students in an effort to better understand the process of religious development and the relationship between religiosity and mental health. This study analyzes that data by examining the stability of two different religious development styles that were identified in 1984, the stability of religious motivations over the course of adulthood, and the relationship between devoutness and psychopathology. This study found that (a) the religious developmental styles did not remain consistent from 1984 to 2001, (b) the participants' religious motivations remained stable over the course of …

Intricacies Of Development : The Impact Of Maternal Experience And Isolation On The Social Development Of Juvenile Male Rats, Lillian Maria Christon

Master's Theses

Reproductive experience induces changes in females. Parity-related differences in maternal treatment of offspring can induce enduring changes in offspring. The relationships between maternal experience, early social isolation, and development were explored in rodents in this experiment. Male rats were weaned from multiparous (MP) and primiparous (PP) mothers and placed into isolation or social housing for four weeks. They were then observed in a social-interaction test. Social behavior and neural oxytocin and vasopressin were assessed post-testing, while corticosterone levels were measured across the four weeks. Weaning was extremely stressful for all offspring. PP- and MP-raised pups exhibited differences in social behavior, …

Identity Development, Identity Disclosure, And Identity Exploration Among Adolescent Sexual Minorities, Jenna A. Glover

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study investigated the utility of applying the social constructionist perspective to adolescent sexual minority identity development, disclosure, and identity explorations. Differences between middle and late adolescents and male and females were examined. No differences were found between middle and late adolescents on measures of identity development and identity exploration; however, differences in identity disclosure were found regarding history of accidental discovery of sexual orientation. Biological sex differences were found for identity development, disclosure, and exploration. Relationships between same- and opposite-sex attractions, behaviors, romantic experiences, and self-labels are presented. Trends in intentional disclosure patterns and unintentional discovery identify predicted reaction …

Two-Year-Olds' Discrimination Of Gender-Stereotyped Activities, Sara Elizabeth Hill

Theses and Dissertations

Two-year-olds' knowledge of gender-stereotyped tasks was assessed in an experiment that utilized the preferential looking paradigm. The looking times of toddlers' (N = 18) gazes towards gender-consistent and gender-inconsistent activities were measured and assessed. In the procedure, toddlers viewed either a male or female actor on two displays performing a masculine stereotyped activity (shaving, putting on a tie) on one screen and a feminine stereotyped activity (putting on lipstick, putting on nail-polish) on the other screen. Infants also viewed male and female actors performing gender-neutral activities (eating, drinking water) side by side in control trials. Consistent with our predictions and …

Facing The Caree/Family Dichotomy: Traditional College Women's Perspectives, Lisa Michelle Leavitt

Theses and Dissertations

This qualitative study explored the experience of 32 traditional college freshmen women as they sought to choose a career with the idea of balancing career and family in the future. A traditional woman was defined as a woman whose central value system and cultural mores emphasize homemaking and childrearing as their primary role. Guided interviews were conducted to obtain in-depth descriptions of participants' experience. The interviews were transcribed and interpreted using a synthesis of qualitative methods based on Kvale's method. The six themes were as follows: 1. The concept of balancing careers and family life is not being discussed or …

Development Of Visual-Verbal Integration In Working Memory During Childhood And Its Relation To Language And Reading, M. Katrina Smith

Psychology Dissertations

Research has demonstrated working memory improves during childhood and supports vocabulary, grammar, and reading development (Adams & Gathercole, 1995, 1996; Bowey, 1996; Gathercole & Baddeley, 1989, 1990). Prior to the addition of the episodic buffer in Baddeley’s model of working memory (2000a), auditory and visual aspects of working memory were often treated separately without evaluating contributions from the ability to integrate the two forms of information. The present study was designed to investigate the development of visual-verbal integration in working memory and its role in language and reading development. Tests of receptive vocabulary, receptive grammar, and decoding ability were administered …