Social and Behavioral Sciences Commons^™

Does Visual Awareness Of Object Categories Require Attention?, Timothy S. Miller

Masters Theses 1911 - February 2014

A key question in the investigation of awareness is whether it can occur without attention, or vice versa. Most evidence to date suggests that attention is necessary for awareness of visual stimuli, but that attention can sometimes be present without corresponding aware-ness. However, there has been some evidence that natural scenes in general, and in particular scenes including animals, may not require visual attention for a participant to become aware of their gist. One relatively recent paradigm for providing evidence for animal awareness without attention (Li, VanRullen, Koch, & Perona, 2002) requires participants to perform an attention demanding primary task …

Working Memory Performance Across Development And Following Acute Exercise, Patrice L. Stering

Masters Theses 1911 - February 2014

This thesis investigates the developmental trajectory of visuo-spatial working memory as well as the potential influence of acute exercise on working memory performance. Individuals between the ages of 6 and 25 years were randomly assigned to a 30-minute bout of exercise on an elliptical trainer or to a no-exercise control condition. Participants then performed a computerized N-back task to assess working memory. Developmental results suggest that working memory ability continues to develop into early adulthood with the exact trajectory depending on the cognitive demand of the task being assessed. No difference in working memory performance was found between the exercise …

In The Face Of Threat: How Relationship Threat Affects Cognitive Processing, Ariel Baruch

Masters Theses 1911 - February 2014

This investigation examined the hypothesis that the presence of relationship threat leads to decreased working memory capacity, and also changes partner perceptions based on adult attachment style. To test this hypothesis, participants were exposed to a threat or no-threat manipulation and then completed measures examining partner perceptions and individual differences. Results suggest that the threat manipulation might have been strong enough for only highly anxious people. These individuals showed higher levels of working memory capacity following a relationship threat, compared to more securely attached persons, and later described their partners in more global, less desirable terms, regardless of threat condition. …

The Behavioral Effects Of Increased Physical Activity On Preschoolers At Risk For Attention Deficit Hyperactivity Disorder, Jasmin L. Roberts

Masters Theses 1911 - February 2014

Physical activity (PA) has many health benefits, both physical and psychological. PA has been linked to improved cognitive functioning, superior overall health, and enhanced emotional well-being in populations ranging from school-age children to older adults. There has been less research, however, examining the benefits of PA in atypical preschool populations.

The present study examined the efficacy of a PA intervention in preschool-aged children at risk for attention deficit hyperactivity disorder (ADHD). ADHD symptomatology, response inhibition, and physical activity were measured at three time points over a 6-month period. Results provide support for the efficacy of PA as an alleviative tool …

Statistical Bootstrapping Of Speech Segmentation Cues, Nicolas O. Planet

Masters Theses 1911 - February 2014

Various infant studies suggest that statistical regularities in the speech stream (e.g. transitional probabilities) are one of the first speech segmentation cues available. Statistical learning may serve as a mechanism for learning various language specific segmentation cues (e.g. stress segmentation by English speakers). To test this possibility we exposed adults to an artificial language in which all words had a novel acoustic cue on the final syllable. Subjects were presented with a continuous stream of synthesized speech in which the words were repeated in random order. Subjects were then given a new set of words to see if they had …

Modeling Source Memory Decision Bounds, Angela M. Pazzaglia

Masters Theses 1911 - February 2014

Current Signal Detection Theory models of source memory necessitate assumptions about the underlying distributions of source strengths to describe source memory performance. The current experiments applied a modified version of the same-different task in order to plot individual memory stimuli along a controlled dimension of the average frequency of voices. This technique allowed us to determine that subjects were using an independent-observations strategy rather than a differencing strategy when deciding whether two test words were spoken by the same or different female speakers at study. By including two male and two female voices and changing the task distinction from same …

Transposed Letter Effects In Prefixed Words: Implications For Morphological Decomposition, Kathleen M. Masserang

Masters Theses 1911 - February 2014

The nature of morphological decomposition in visual word recognition remains unclear regarding morphemically complex words such as prefixed words. To investigate the decomposition process, the current study examined the extent to which effects involving transposed letters are modulated when the transposed letters cross a morpheme boundary. Previous studies using masked priming have demonstrated that transposed letter effects (i.e. superior priming when the prime contains transposed letters than when it contains replacement letters) disappear or markedly decrease when the transposition occurs across a morpheme boundary. The current experiments further investigated transposed letter effects in prefixed words using both parafoveal previews in …