Prior caffeine research has examined the effects of caffeine on performance using simple, lower-level cognitive tasks. The present study extended this work to investigate the effects of caffeine on performance and self-report mood measures during execution of a complex cognitive task. In a between-subjects design, 116 participants were administered either caffeinated or non-caffeinated chewing gum. Results showed higher fatigue and negative affect (NA) levels and lower positive affect (PA) and task performance levels in the placebo condition. These findings replicate prior findings on mood effects of caffeine; also, they extend the limited results on performance effects of caffeine by demonstrating moderate support for improved complex cognitive task performance after caffeine intake. Furthermore, these results show the efficacy of gum for caffeine administration in research.

Thesis (M.A.)--University of Missouri-Columbia, 2003. / Typescript. Includes bibliographical references (leaves 41-44). Also available on the Internet.

Thesis (M.A.)--University of Missouri-Columbia, 2003. / Typescript. Includes bibliographical references (leaves 41-44). Also available on the Internet.

Title from title page of PDF (University of Missouri--St. Louis, viewed February 23, 2010). Includes bibliographical references (p. 53-60).

Recent work in anthropology has translated systemic disjuncture to individual subjectivity, under the premise that "disordered" political economies cause "disordered" identities. However this work underplays the role of affect in "gathering" subjectivity amidst external transformation. The following thesis proposes a concept of "mood" as a set of conjoined, low-level affects that provides continuity in contexts of neoliberalism and change. It investigates women's "moods" in an urbanizing region of Uttarakhand, India. Drawing from ethnographic interviews in a village, and a migrant community, mood is shown to involve components of capitalist anxiety that articulate with attitudes of docility and duty. Experiences typically described as "postmodern" including "incompleteness", "estrangement" and "alienation", are common to, and produce "classical" gendered affects in both rural and urban settings. Although anxiety can be destabilizing, it joins paradoxically with these affects to lubricate women's sense of "belonging" in a place.

During the past decade, there has been increased attention on the role of mood on risk-taking and judgment. According to Isen¡¯s (1987) mood-maintenance hypothesis, individuals in a negative mood state tend to take greater risks than individuals in a neutral or positive mood state in order to improve their mood. In contrast, however, theorizing and research derived from an information-processing perspective indicates that individuals in a negative mood are more likely to engage in deliberate cognitive processes directed toward avoiding risk. This study seeks to resolve the discrepancy between these two perspectives by examining the influence of systematic cognitive processing as a mood regulation strategy (Forgas, 1998). Negative mood states were induced using a standardized film clip procedure. Participants then completed a risk-taking questionnaire either immediately following the induction, after performing a moderately difficult word anagram task, or after a delay period. As expected, participants in the anagram task condition showed lower levels of risk-taking preference than participants in the immediate judgment and delayed task conditions. Implications and future research directions for research in risk-taking and mood regulation are discussed.

Thesis (M.S.)--University of Massachusetts Amherst, 2008. / Includes bibliographical references (p. 46-52).

Thesis (M.S.)--Missouri State University, 2008. / "May 2008." Includes bibliographical references (leaves 45-49). Also available online.

Thesis (M.S.)--University of Michigan, 1999. / Running title: Social support and depressed mood state. Includes bibliographical references.

Thesis (M.S.)--University of Michigan, 1999. / Running title: Social support and depressed mood state. Includes bibliographical references.