Cognition and Perception Commons^™

Examining The Effects Of Noise And Task Dependent Performance In Prosody Perception In Autistic Individuals, Zehranur Sasal

Theses and Dissertations (Comprehensive)

ABSTRACT

Objective: It is known that autistic individuals have enhanced abilities in pitch discrimination and tend to excel in low-level tasks requiring lower cognitive processing. On the other hand, noise is a distracting factor in many areas of life, including prosody perception. The studies presented in this thesis aimed to understand prosody perception through different levels of cognitive tasks and under the influence of speech background noise.

Methods: In total, 256 non-autistic and 39 high-functioning autistic adults participated in these studies. In the first study, participants were asked to listen to brief utterances conveying one of six universally accepted emotions …

The Long-Term Effects Of Cannabis On Attention To Motion, Rachel Mccaig

Theses and Dissertations (Comprehensive)

The purpose of the following study was to investigate the long-term effects of cannabis use on attention to motion.

Methods: Cannabis users, who varied in age of onset of use, were compared to control participants after abstaining from cannabis for at least 24 hours. One-hundred and ninety-seven participants engaged in a cognitive assessment followed by a motion discrimination task and an attention to motion task. The assessment consisted of a series of standard tasks that measured a range of cognitive processes such as attention, memory, and executive functioning. The motion discrimination task assessed the participants’ abilities in discriminating between various …

Investigating The Inhibition Of The Return Of Attention In The Tactile Domain, Robert Plax

Theses and Dissertations (Comprehensive)

Purpose: The time-course needed to elicit tactile inhibition of return (IOR) has not been well-defined due to the paucity of research in this area especially studies investigating spatial discrimination. Reportedly tactile IOR uses higher-order mental representations to orient attention spatially yet the properties of low-level dermatomal maps may better account for how IOR orients tactile attention in space although its contribution is unclear. The present study sought to establish a time-course that evokes IOR in a unimodal tactile spatial discrimination task and decouples the contribution of the dermatome from higher-order representations. Methods: Two conditions containing distinct tactile cue-target paradigms designed …

The Influence Of Freedom And Choice In Action Selection And The Valence Of Action-Outcomes On The Sense Of Agency, Zeynep Barlas Wilfrid Laurier University

Theses and Dissertations (Comprehensive)

Sense of agency (SoA) refers to the subjective experience that one is the author of their actions and the ensuing outcomes of these actions. Previous research have suggested that both sensorimotor processes and high level inferences can contribute to the SoA. In five experiments, the present thesis examined the effects of action selection processes and the valence of action-outcomes on the SoA. The majority of these experiments measured the SoA by obtaining both subjective feeling of control (FoC) judgments over the action-outcomes, and assessing the size of intentional binding. Intentional binding refers to the perceived temporal attraction between actions and …

An Examination Of The Factors That Dictate The Relative Weighting Of Feedback And Feedforward Input For Speech Motor Control, Nichole E. Scheerer

Theses and Dissertations (Comprehensive)

Speech is arguably the most important form of human communication. Fluent speech production relies on auditory feedback for the planning, execution, and monitoring of speech movements. Auditory feedback is particularly important during the acquisition of speech, however, it has been suggested that over time speakers rely less on auditory feedback as they develop robust sensorimotor representations that allow speech motor commands to be executed in a feedforward manner. The studies reported in this thesis recorded speaker’s vocal and neural responses to altered auditory feedback in order to explore the factors that dictate the relative importance of auditory feedback for speech …

An Investigation Of The Increased Reliance On Familiarity In Associative Recognition Of Unitized Compound Word Pairs, Fahad Naveed Ahmad

Theses and Dissertations (Comprehensive)

Unitization refers to when two components are integrated or combined into a single unit. So the whole is more familiar than the parts (Graf & Schacter, 1989). Previous researchers have shown unitization of unrelated word pairs can occur by the use of compound definition. As support, they have found unitization to increase reliance on familiarity in associative recognition. The purpose of this PhD dissertation was to examine the effects of unitization of preexperimental associations on associative recognition. The effects of associative recognition of unitized compound word (CW) pairs can serve as a useful benchmark to compare to that of other …

A Heart-Based Sufi Mindfulness Spiritual Practice Employing Self-Journeying, Faruk Arslan

Theses and Dissertations (Comprehensive)

Spiritual Psychology is the study and practice of the art and science of the human evolution of consciousness. The heart occupies an important place in Sufism and is considered to contain the divine spark that leads to spiritual realization. Fethullah Gülen’s action-oriented Sufi methods described in his book series “The Emerald Hills of the Heart” provides the basis for a heart-based therapeutic intervention through self-journeying, which is the objective of this thesis. These self-purification and mindfulness-related transpersonal methods generate a form of treatment that is culturally sensitive. Through my reflections in this research, I transformed my personal experiences into …

Psychological Mechanisms Responsible For The Moderating Effects Of Need For Cognition On Attractiveness Stereotyping, Samantha D. Hansen

Theses and Dissertations (Comprehensive)

This thesis focuses on the psychological mechanisms responsible for the moderating role of need for cognition (NFC) in attractiveness stereotyping. Attractiveness stereotyping refers to the tendency to attribute more positive characteristics to attractive than to unattractive individuals. Recent research has found that people high in NFC show less of this attractiveness bias. The present research used two approaches to test the hypothesis that NFC moderates the bias because persons higher in NFC have greater motivation and ability to engage in systematic thought processes. First it included measures to assess the types of thoughts that participants high and low in NFC …

The List-Strength Effect And Categorical Frequency Memory: Tests Of Availability, Joanne Bonanno

Theses and Dissertations (Comprehensive)

The availability view of memory mantains that the retrieval of categorical frequency information is a function of recall of category exemplars. The List-Strength Effect (LSE), which is evidenced when increasing the strength of competing items in a list reduces memory for the other items, has been found to be a characteristic of recall, but not recognition, performance. The present study was designed to (a) further examine the relationship between cued recall and frequency judgments of category exemplars by testing for the presence of a LSE in categorical frequency estimation; and (b) to examine the role that estimation strategies may play …

Assessment Of Visual/Orthographic Awareness In Beginning Readers, Hope Elizabeth Lemoine

Theses and Dissertations (Comprehensive)

Various models reading development (Frith, 1985; Gough & Hillenger, 1980; Marsh, Friedman, Welch, & Desberg, 1981) have suggested that word shape is of critical important to early readers when recognizing words they know. As children progress through the early stages of reading, critical features such as first letter then become the important definers of word recognitions among early readers until they are at a much more advanced stage (Frith, 1985). More generally, advanced orthographic awareness among early readers is not considered to play an important role until children are older and have established a more advanced reading vocabulary. The purpose …

The Effect Of Priming, Christian Orthodox Beliefs, And Training On Critical Thinking, Cheryl Norry

Theses and Dissertations (Comprehensive)

This study investigated the extent to which pro and antireligious individuals responded objectively and critically to religious and nonreligious material. Proreligious (n=72) and antireligious (n=72) individuals, as determined by Fullerton and Hunsberger’s (1982) Christian Orthodoxy Scale, were selected from 507 introductory psychology students. They judged the logical soundness of 30 syllogisms (10 proreligious, 10 antireligious, and 10 neutral) following a priming task (critical, religious, or neutral). Prior to the analysis of the syllogisms, half of the subjects were given logic training, while the other half did not receive any instruction in logic. Dependent variables included critical ability (i.e., the number …