The purpose of the present study was to investigate the role of pitch contours in directing infant attention to adult speech. Several studies have shown that infants from a few days old to 9 months of age prefer infant-directed (ID) over adult-directed (AD) speech. Moreover, 4-month-olds have been shown to prefer pitch contours that simulate ID speech, suggesting that the exaggerated pitch contours are necessary for infant attention. The current study investigated this attentional preference utilizing ID and AD pitch contours in a fixation-based preference procedure. Results from the first experiment failed to show a similar preference for the ID pitch contours. Because a lack of preference could have been due to a failure to discriminate, a habituation study was also conducted. The results from the second experiment showed that 4-month-olds can discriminate the ID and AD pitch contours. From these results, it is argued that the pitch contour may be but one of many possible prosodic characteristics that attract infant attention and this attention may occur only within a language context. It is suggested that future studies investigate ID speech using a more context-dependent procedure, where natural or more complete speech samples are utilized. / Master of Science

The purpose of this study was to determine the effect of instrumental timbre preference and instrumental timbre on the error detection skills of undergraduate conducting students. The study sought to answer two specific questions: Is timbre preference, as determined by Gordon's (1984) <u>Instrumental Timbre Preference Test</u> (ITPT), a factor in the ability of undergraduate conducting students to detect errors in pitch in short melodies while viewing the score? Is the ability of undergraduate conducting students to detect pitch errors in melodic passages influenced by the instrumental timbres of the band ensemble? To answer these two questions, Gordon's ITPT and the researcher developed <u>Test of Timbre Effect</u> (TTE) were administered to 147 undergraduate conducting students in 11 colleges and universities in Virginia, North Carolina, and Tennessee. The TTE was designed to consist of seven different subtests, each intended to be administered to a different sample of homogeneous undergraduate conducting students. Each subtest consisted of 14 randomized test items, including two melodies designated as "target melodies" that differed only in timbre across the subtests. The effect of timbre preference, timbre, and the interaction of the two independent variables was determined by a 2 x 7 analysis of covariance (ANCOVA) of each target melody. Further analysis was conducted using a two-way multivariate analysis of covariance (MANCOVA). Results indicated that timbre preference, timbre, and the interaction of timbre preference and timbre did not have an effect on the ability of undergraduate conducting students to detect pitch errors in short melodic passages. / Ed. D.

Forty-two college aged participants took part in a mixed repeated measures factorial design experiment that assessed color memory as a function of condition (practice with feedback, practice without feedback and no practice), dimension (hue, saturation and lightness) and color (red, yellow, green and blue). Attention was focused on the distinction between memory color and color memory, color experience and preference, mechanisms of color perception and theories of color vision (see below). Only two significant effects were found: a significant main effect for dimension and a significant interaction between dimension and color. Pearson correlations were assessed between color memory and color experience, color preference and observer imagery. None of the correlations were significant. The results of the experiments revealed that practice does not have a significant effect on color memory and the conclusion, therefore, is that the phenomenon of color memory is not improved by practice. A tentative explanation involves the early stages of color processing which are presumed to be computational in nature and to take place independently of cognitive processes such as learning and memory, which do not take place until visual information has reached the extrastriate areas. By that time, color information has been combined with information about context, in area V4 of the human visual cortex (Zeki & Marini, 1998). Although it has been shown through this experiment that practice does not improve memory for color, the possibility remains that practice may improve memory color for specific objects - namely ecologically relevant stimuli - since memory color involves higher order processing, such as learning and memory. / Master of Science

Hard cider or "cider" is a fermented, alcoholic beverage made from the juice of apples. The cider industry has experienced recent growth within the United States and Virginia. Virginia is one of the largest producers of apples in the United States, and apples are considered a top commodity in the state. Currently, there is inconsistent terminology to describe Virginia cider, and cider producers are using descriptors that are usually associated with beer and wine. Thus, this study aims to identify the distinct sensory profiles of Virginia ciders and to identify drivers of consumer liking. Understanding sensory profiles and drivers of consumer liking for Virginia ciders will aid consumers in understanding what kind of cider styles they prefer and could help producers identify acceptable cider products. A descriptive analysis (DA) was completed to determine a well-defined sensory profile for Virginia hard ciders. The DA consisted of 24 ciders that producers considered to be representative of Virginia and their brands from 16 of the 32 known cider producers in Virginia. In the DA, 6 panelists defined reference standards for 48 descriptors consisting of 20 aromas, 3 tastes, 13 flavors, and 12 mouthfeel attributes. Through M/ANOVA, 22 descriptors were identified as significant, and 6 groups of ciders were identified using Hierarchical Cluster Analysis (HCA). Then, an exploratory consumer study using 8 representative ciders from the DA was conducted with 67 subjects. Subjects were first asked a series of demographic questions, then presented with samples in randomized, sequential, monadic fashion and reported overall liking, purchasing intent, and willingness to pay. Internal and external preference mapping was accomplished with Partial Least Squares Regression (PLS) and Clustering Around Latent Variables (CLV). Three distinct clusters were identified with distinct product and sensory preferences. Finally, basic chemical analyses of all samples were performed. The DA demonstrated that Virginia ciders have distinct sensory characteristics and fall into distinct sensory groups. The 3 consumer clusters found through CLV may represent cider drinkers' preferences in both Virginia and the United States. While no unusual cider chemistry was found, we were able to observe expected connections between chemistry and sensory profiles. / Master of Science in Life Sciences / Hard cider is the fermented beverage made from apples. It is also known as "cider" outside of the United States. In recent years, the cider industry has experienced growth both nationwide, and within the state of Virginia. Usually, ciders are described using words that are used to describe wine and beer. The aim of this study is to define descriptive terminology for Virginia ciders and identify drivers of consumer liking. Understanding sensory profiles and drivers of consumer liking for Virginia ciders will aid consumers in understanding what kind of cider styles they prefer and could help producers identify acceptable cider products. A descriptive analysis (DA) was completed to determine a well-defined sensory profile for Virginia hard ciders. The DA consisted of 24 ciders that producers considered to be representative of Virginia and their brands from 16 of the 32 known cider producers in Virginia. In the DA, 6 panelists defined reference standards for 48 descriptors consisting of 20 aromas, 3 tastes, 13 flavors, and 12 mouthfeel attributes. A total of 22 attributes were identified as being significant, and 6 distinct groups of ciders were identified. Then, an exploratory consumer study using 8 representative ciders from the DA was conducted with 67 subjects. Subjects were first asked a series of demographic questions, then presented with samples and reported overall liking, purchasing intent, and willingness to pay. Three distinct clusters of consumers were identified with distinct product and sensory preferences. Finally, basic chemical analyses of all samples were performed. The DA demonstrated that Virginia ciders have distinct sensory characteristics and fall into distinct sensory groups. The 3 consumer clusters may represent cider drinkers' preferences in both Virginia and the United States. While no unusual cider chemistry was found, we were able to observe expected connections between chemistry and sensory profiles.

The problem consists of investigating relationships between the Wechsler Bellevue Intelligence Scale, Form I, and the Kuder Preference Record-Personal.

This dissertation consists of three essays on forms of preference heterogeneity in discrete choice models. The first essay uses a model of heterogeneity conditional on observed individual-specific characteristics to tailor financial incentives to enhance weight loss program participation among target demographics. Financial incentives in weight loss programs have received attention mostly with respect to effectiveness rather than participation and representativeness. This essay examines the impact of financial incentives on participation with respect to populations vulnerable to obesity and understudied in the weight loss literature. We found significant heterogeneity across target sub-populations and suggest a strategy of offering multiple incentive designs to counter the dispersive effects of preference heterogeneity. The second essay investigates the ability of a novel elicitation format to reveal decision strategy heterogeneity. Attribute non-attendance, the behaviour of ignoring some attributes when performing a choice task, violates fundamental assumptions of the random utility model. However, self-reported attendance behaviour on dichotomous attendance scales has been shown to be unreliable. In this essay, we assess the ability of a polytomous attendance scale to ameliorate self-report unreliability. We find that the lowest point on the attendance scale corresponds best to non-attendance, attendance scales need be no longer than two or three points, and that the polytomous attendance scale had limited success in producing theoretically consistent results. The third essay explores available approaches to model different features of unobserved heterogeneity. Unobserved heterogeneity is popularly modelled using the mixed logit model, so called because it is a mixture of standard conditional logit models. Although the mixed logit model can, in theory, approximate any random utility model with an appropriate mixing distribution, there is little guidance on how to select such a distribution. This essay contributes to suggestions on distribution selection by describing the heterogeneity features which can be captured by established parametric mixing distributions and more recently introduced nonparametric mixing distributions, both of a discrete and continuous nature. We provide empirical illustrations of each feature in turn using simple mixing distributions which focus on the feature at hand. / Ph. D.

The beginning of the twenty-first century found American society sharply divided and American culture in the midst of tumult; the driving forces behind these changes being individualism, multiculturalism and the politics of gender and sexual orientation. As a result, social structure and what were once traditional values have been abandoned for political correctness. With reports of personal crimes committed on juveniles on school property on the rise, clearly, these shifts away from tradition have trickled down from society at large to the sphere of the public school. Students no longer are using traditional socially accepted norms and values as viable guides to their behavior (Hudak, Ander & Allen, 1980), but violence, which has become a way of attaining respect and self worth as well as material possessions. Some of the most disturbing reports that have been brought to the public's attention are those of students assaulting and robbing one another at knife and gunpoint for clothing. The conceptual framework was that of appearance perception. Clothing and appearance are extremely important to children in their efforts to compete as well as to successfully fit in with their peers. Many school reform efforts have implemented school uniform policies as a way of building a sense of unity and belonging among students, as well as a way of controlling behavior. However, despite the numerous studies that have attempted to show that nonverbal communication may form impressions of personality, character traits, and intelligence, none have focused on school uniforms and their reflection of the personal values of the wearers. This study determined the uniform preferences of uniform-wearing students for middle school children, and described the five terminal values that these students attributed to uniformed students. This research also determined whether there were significant differences between the probabilities of males and females having the same perceptions of the terminal values attributed to uniformed students, because research has shown that these perceptions have a direct effect on style preferences. The sample was comprised of 85 students between 18 and 21 years, who attended a military institute of higher education in which they were required to wear uniforms on a daily basis. Respondents completed a three-part questionnaire, which consisted of: (1) Rokeach Value Survey, (2) demographics questions, and (3) wearer preference measure. The instrument was pilot tested for content validity before it was administered to the sample. Data were analyzed using Pearson Chi-squares and frequencies. The chi-square tests revealed no significant differences in the probability of males and the probability of females selecting the same terminal values for uniformed students. Examination of frequencies determined design criteria for males and females uniform design as well as the five core terminal values attributed to uniformed students. / Master of Science

As one of the most enduring theories in communication, gatekeeping suggests that stories have to move from one gate to another gate before being published. During this process, some stories are selected, while others are rejected. Previous studies heavily focus on traditional news media and explore the influence of internal and external forces on story selection. Very few studies, however, look at gatekeeping in new areas of technology. This case study extends this literature into social media. It looks at how editors at The Asian Magazine (TAM) select stories for its WeChat public account. Interviews with editors identify news values and news categories that these gatekeepers think are important. Results of the WeChat content analysis between May and August 2014 indicate that TAM editors do not strictly rely on established news values to select WeChat stories. News categories better predict story decisions. Examining which WeChat items generate the most reader engagement gives evidence of how well news content matches what attracts readers online. News category priorities closely match what readers want to read. / Master of Arts

There is a limited amount of research that has evaluated all three types of modalities and consequences during stimulus preference assessments (SPA) or examined problem behavior during preference assessments with individuals with tangible maintained problem behavior. Therefore, the purpose of this study was to extend this line of research in two ways: (a) compare results of SPAs across three modalities and two consequence, (b) evaluate problem behavior during these SPAs with individuals with problem behavior maintained by access to tangible items. The results indicated that for all participants, there was preference stability across modalities and conditions. For all participants, problem behavior occurred during the no access condition or removal regardless of modality.

Considerable media research has established that much of mainstream, United States based news is historically rife with content that both implicitly and explicitly reinforces popular cultural norms. Combined with a history full of inequities towards marginalized groups, many of which were based on race, consumption of mainstream news has been linked to increased hostility and more negative attitudes towards non-Whites in the United States. That said, much of this work views news from a monolithic perspective of news programming, irrespective of the differences in political orientation or broadcast integrity. By using quantitative assessments of how various mainstream news programs score on both left/right and fact/opinion-based dichotomies, the purpose of the present study is to address these gaps. As models for how mainstream news consumption is related to existing race-related attitudes, theoretical foundations of cultivation theory (how long viewers watch), the motivation and opportunities model (if viewers are motivated in their viewing) and social ecology theory (who viewers are), were used in relation to these dichotomies. However, overall results suggest that, while time spent with news, race, and gender appear to affect news consumption's relationship with race-related attitudes, preference for left vs. right wing news and fact vs. opinion-based was less relevant, with marginal effect sizes at best. Implications and future directions considering these results are discussed.