Cognitive Neuroscience Commons^™

An Infrasonic Missing Fundamental Rises At 18.5hz, Christopher D. Lacomba, Steven A. Lloyd, Ryan A. Shanks

Papers and Publications: Interdisciplinary Journal of Undergraduate Research

The Missing Fundamental (MF) phenomenon is an auditory processing artifact which arises from the perception of a harmonically-structured complex sound in the absence of the complex sound’s fundamental frequency (f₀). Constructive interference occurring between constituent waveforms of the harmonic series may elicit a perceptible tone at the f₀’s pitch. A related illusion, known as binaural auditory beats (BAB), may also generate nonexistent perceptible pitches through a shared mechanism. A harmonic series suggesting to an infrasonic f₀ (1/f) noise and broken MF conditions. This data suggests that an infrasonic MF tone is generated, despite the ...

The Effects Of Pedagogical Conditions On Second Language Acquisition, Mccall Evonne Sarrett

University of Tennessee Honors Thesis Projects

No abstract provided.

Brain Function Differences In Language Processing In Children And Adults With Autism, Diane L. Williams, Vladimir L. Cherkassky, Robert A. Mason, Timothy A. Keller, Nancy J. Minshew, Marcel Adam Just

Marcel Adam Just

No abstract provided.

Exploring The Neural Basis Of Top-Down Guided Action In Macaque Monkeys, Jessica M. Phillips

University of Western Ontario - Electronic Thesis and Dissertation Repository

To thoroughly characterize any brain mechanism requires an appropriate animal model for invasive studies. An invaluable model system used toward a comprehension of cognitive neurophysiology is the macaque monkey. It is important to delineate similarities and limitations for this model in relation to the human brain and cognition. In this thesis, we have thus conducted three experiments to investigate putative generalizations between monkeys and humans regarding the neural processes associated with top-down action control in monkeys.

Our daily behaviour is largely comprised of automatic routine actions. The frequent repetition of certain behaviours in response to particular contexts can give rise ...

Interactions Between Lexical And Syntactic Knowledge During Incremental Processing Of The Causative Construction In English, G. Taylor Brooks

Georgia State Undergraduate Research Conference

No abstract provided.

Cross-Cultural Colour–Odour Associations, Jiana Ren, Andy Woods, Kirsten Mckenzie, Lx Ru, Carmel Levitan

Carmel Levitan

Associations between colour and odour are likely culturally specific. Exposure to a new culture’s cuisine and food customs however may alter these associations. Here we test for cultural colour–odour association differences and whether exposure to a new culture impacts upon these associations. Participants were given 14 odours and choose from a chart of 36 randomly presented colours which of 3 colours they most associated with each odorant, and which of 3 colours was least associated with each. Data collection was done on Android and Apple iPod devices using Xperiment software (see www.xperiment.mobi). In the first study ...

The Social Experiences Of Spouses Of Persons With Young-Onset Dementia, Stacey A. Hawkins

Open Access Dissertations and Theses

Spousal caregivers of persons with young-onset dementia (YOD) are known to experience significant social impacts, including family conflict, social avoidance, and marginalization. However, no qualitative study has examined the social experiences of YOD spousal caregivers within the Canadian context. This thesis examined the described social experiences of these caregivers. A descriptive, qualitative approach was used to study the nature of these social experiences using in-depth, semi-structured interviews. Ten YOD spousal caregivers living in Ontario completed the study. Four themes emerged from the analysis: sources of social support, giving up activities in favour of new activities, adapting and maintaining in social ...

The Effects Of Aging On Motion Perception In Healthy Older Adults, Lia E. Tsotsos

Open Access Dissertations and Theses

Motion perception is required for nearly all aspects of daily living. Previous work has shown that the ability to perceive a variety of different types of motion is significantly affected by increasing age. The research described in this thesis further probes the complex effects of aging on motion perception using a number of different stimulus configurations and performance measures. In order to relate psychophysical performance to neurophysiological recordings, we used two different notched-noise masking techniques to estimate the directional selectivity of masking in younger and older adults. We found evidence to suggest that the directionally-selective mechanisms of older adults are ...

Fmri Reveals The Neural Correlates Of Real And Pantomimed Tool Use In Humans, Joseph Umberto Paciocco

Electronic Thesis and Dissertation Repository

Although functional magnetic resonance imaging (fMRI) can be used to study the neural mechanisms underlying greatly expanded cognitive functions in humans like tool use, surprisingly little fMRI research has been done on actual tool use. In fact, due to technical constraints, most fMRI studies have used pantomimed actions as a proxy for real use. However, human neuropsychology patients who are impaired at pantomiming often improve when handling a tool suggesting potential neural differences. We used fMRI to record brain activation while 13 right-handed participants performed one of two tasks, real or pantomime tool use with one of two tools, a ...

Symbolizing Number: Fmri Investigations Of The Semantic, Auditory, And Visual Correlates Of Hindu-Arabic Numerals, Ian Douglas Holloway

Electronic Thesis and Dissertation Repository

Humans are born with a sensitivity to numerical magnitude. In literate cultures, these numerical intuitions are associated with a symbolic notation (e.g..Hindu-Arabic numerals). While a growing body of neuroscientific research has been conducted to elucidate commonalities between symbolic (e.g. Hinud-Arabic numerals) and non-symbolic (e.g. arrays of objects) representations, relatively little is known about the neural correlates specific to the symbolic processing of numerical magnitude. To address this, I conducted the three fMRI experiments contained within this thesis to characterize the neuroanatomical correlates of the auditory, visual, audiovisual, and semantic processing of numerical symbols.

In Experiment 1 ...