This thesis examines the effects of linguistic input on the development of children’s epistemic concepts. It draws upon two fundamental questions in the field of cognitive development: (a) whether distinctions between automatic and controlled forms of cognitive processing are indicative of underlying conceptual differences, and (b) whether language is critical to the process of concept development. To establish the background of the current research, a summary of how these theoretical questions have been addressed in other fields of cognitive psychology is first provided (Chapter 1). These questions are then re- examined within the specific domain of epistemic concept development (Chapter 2). Changes in false-belief processing that occur between infancy and the early preschool years are discussed in relation to two competing theories of false-belief development. A framework to explain how language promotes children’s transition between automatic and controlled forms of processing is then provided. It is suggested that language facilitates change by both reducing the cognitive demands associated with controlled response tasks as well as assisting with the formation of robust epistemic representations. An empirical study that was designed to examine the effects of epistemic language (i.e., verbs and syntax) on children’s automatic and controlled processing of belief is then described (Chapters 3 to 5). Eighty-four children (Mage = 3;5 years), who initially failed elicited measures of false-belief, were trained with visual contexts of true- and false-belief. The critical manipulation across three conditions was the linguistic input presented in conjunction with these contexts. Children heard narrations that contained either (a) the description of an agent’s actions without an epistemic verb, (b) a familiar epistemic verb (thinks) across both contexts, or (c) the familiar epistemic verb in contexts of true-belief and a novel epistemic verb (gorps) in contexts of false-belief. Results demonstrated a significant advantage for children who were trained with epistemic verbs on spontaneous measures of false-belief (i.e., anticipatory gaze). Significant effects of epistemic verb exposure were also demonstrated in novel contexts of belief induction. Implications of these findings are discussed in relation to theories that make distinct predictions about the role of language in epistemic concept development (Chapter 6).

How do infants learn the sounds of their native language? Do they need to use general-auditory or language-specific mechanisms to make sense of the distributional nature of their phonetic input? To answer this question, this study investigated the neural correlates of phonetic discrimination in monolingual and bilingual infants (2-6 and 10-14 months) and adults using a new lens afforded by functional Near-Infrared Spectroscopy (fNIRS) neuroimaging. All participants heard syllables phonetically contrastive in their native English and Hindi (non-native) in an oddball paradigm while being imaged with fNIRS. Age comparisons of infant brain activation in multiple sites revealed that left Broca‟s area showed a developmental decline in response to native-language experience only. Bilateral STG showed robust recruitment at both ages in response to both stimulus languages. These findings were robust across monolinguals and bilinguals. Together, the results suggest that all infants use neural tissue predisposed for linguistic-phonetic processing in early life.

This study examined written expression skills in children with attention problems with and without word reading difficulties. The sample consisted of 28 children with attention problems (AP) only, 18 children with coexisting attention and reading problems (ARP), and 34 children without attention or word reading difficulties (TYP). Curriculum-based measurement (CBM) indices of accuracy and fluency, plus teacher ratings of handwriting, spelling, and overall writing skills were used to assess children’s written expression skills. The analyses indicated that the AP and ARP groups received significantly lower scores on all measures of written expression than the TYP group. The ARP group scored significantly lower than the AP group on the teacher ratings of writing and spelling. These findings suggest that inattention is significantly related to written expression difficulties independent of word-reading skills.

The purpose of this study was to evaluate the effectiveness of school policies aimed to reduce adolescent alcohol and marijuana use. More specifically, the study investigated whether more severe school policy measures are related to the increased or decreased instances of overall alcohol and marijuana use on and beyond school grounds among grade 10 and 12 students. I used data from the National Education Longitudinal Study (NELS). After controlling for a number of prior measures of environmental and demographic factors that are significant predictors of adolescent alcohol and marijuana use, the school policy measures showed no impact on either alcohol or marijuana use at any level of its consumption. This was true for both grade 10 and grade 12 students. The study’s findings suggest that instead of constructing punitive policy measure, policymakers should develop prevention and intervention programs that more specifically target the needs of adolescents, peers, parents, and teachers.

This study examined the acquisition of Hebrew noun plurals in early immersion and bilingual education by focusing on performance, as well as morpho-syntactic and semantic errors in inflecting nouns. A total of 196 students from Senior Kindergarten (n = 86) and grades 1 (n = 58) and 2 (n = 53) were administered measures of inflectional morphology in Hebrew. Results indicated that children applied high frequency, salient, simple to apply inflectional patterns involving male-female nouns, as well as the basic way of noting plurality. Two major obstacles in the pluralisation of Hebrew nouns were suffix regularity and stem transparency. Error analysis revealed three categories of responses: rule-based, analogy-based and non-strategic errors. The principal conclusion was that errors notwithstanding, young children learning Hebrew as a foreign language are moving toward an understanding of plural formation. The development of morpho-syntactic structures gradually develops over time and with exposure to Hebrew instruction.

This study examined the oral language abilities of 100 English as-a-second-language (ESL) and 50 English as-a-first-language (EL1) students in grade 5 with and without reading disabilities. Students with reading disabilities were further divided into two groups: poor decoders and poor comprehenders. A MANOVA was conducted to determine the effect of language group and reading group on the students’ cognitive and linguistic skills. The ESL students demonstrated delays in receptive vocabulary as measured by the PPVT, but were comparable to EL1 students on all other measures. Significant differences were found between reading groups for both language groups. Normal readers performed significantly better than poor decoders and poor comprehenders on all of the oral language measures. The poor decoders performed significantly better than poor comprehenders on an oral language task assessing listening comprehension. This research demonstrates that students with reading difficulties also have difficulties in oral language proficiency, regardless of second language status.

The scientific study of wisdom is a contentious field. There is little agreement among dominant research programs concerning how to conceptualize and measure the elusive phenomenon of wisdom. The current study argues for a narrative analysis of this concept given that autobiographical stories offer a contextually rich vista into real-life manifestations of wisdom. Presented here is a qualitative investigation of autobiographical wisdom narratives from 8 individuals distributed across parameters of age, gender, and degree of wisdom. Results point to the possibility that relatively wise persons define wisdom more elaborately, participate in more sophisticated autobiographical reasoning processes, and engage with master narratives in a more evaluative and critical manner than relatively unwise individuals. These features did not appear to differ across levels of age and gender. This study validates a narrative approach to the science of wisdom, and suggests that stories may be central to advancing our understanding of this concept.

Introduction: Little is known about the physical activity [PA] habits of children with Autism Spectrum Disorders [ASD]. ASD specific PA barriers and facilitators have not been investigated. Purpose: To describe the PA habits of children with ASD and the barriers and facilitators to optimal PA participation. Methods: Twenty-three parents of children with ASD reported on their child’s PA habits, perceived barriers to PA participation, and functioning. A rating scale was applied to score responses and children were classified into functional level groups and PA level groups. Results: On average, children were reported to meet or exceeded national PA frequency guidelines, belonged to active families and participated in a variety of physical activities. Parents identified several barriers to optimal PA for their children. Conclusions: Children with ASD can attain optimal PA. Exposure to a variety of PA opportunities and experiences aids in identifying the ideal activity for each individual child.

The purpose of this study was to evaluate the effectiveness of school policies aimed to reduce adolescent alcohol and marijuana use. More specifically, the study investigated whether more severe school policy measures are related to the increased or decreased instances of overall alcohol and marijuana use on and beyond school grounds among grade 10 and 12 students. I used data from the National Education Longitudinal Study (NELS). After controlling for a number of prior measures of environmental and demographic factors that are significant predictors of adolescent alcohol and marijuana use, the school policy measures showed no impact on either alcohol or marijuana use at any level of its consumption. This was true for both grade 10 and grade 12 students. The study’s findings suggest that instead of constructing punitive policy measure, policymakers should develop prevention and intervention programs that more specifically target the needs of adolescents, peers, parents, and teachers.

This study examined the oral language abilities of 100 English as-a-second-language (ESL) and 50 English as-a-first-language (EL1) students in grade 5 with and without reading disabilities. Students with reading disabilities were further divided into two groups: poor decoders and poor comprehenders. A MANOVA was conducted to determine the effect of language group and reading group on the students’ cognitive and linguistic skills. The ESL students demonstrated delays in receptive vocabulary as measured by the PPVT, but were comparable to EL1 students on all other measures. Significant differences were found between reading groups for both language groups. Normal readers performed significantly better than poor decoders and poor comprehenders on all of the oral language measures. The poor decoders performed significantly better than poor comprehenders on an oral language task assessing listening comprehension. This research demonstrates that students with reading difficulties also have difficulties in oral language proficiency, regardless of second language status.