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- Genre: Doctoral Dissertation
Description
Current theoretical debate, crossing the bounds of memory theory and mental imagery, surrounds the role of eye movements in successful encoding and retrieval. Although the eyes have been shown to revisit previously-viewed locations during retrieval, the functional role of these saccades is not known. Understanding the potential role of eye movements may help address classic questions in recognition memory. Specifically, are episodic traces rich and detailed, characterized by a single strength-driven recognition process, or are they better described by two separate processes, one for vague information and one for the retrieval of detail? Three experiments are reported, in which participants encoded audio-visual information while completing controlled patterns of eye movements. By presenting information in four sources (i.e., voices), assessments of specific and partial source memory were measured at retrieval. Across experiments, participants' eye movements at test were manipulated. Experiment 1 allowed free viewing, Experiment 2 required externally-cued fixations to previously-relevant (or irrelevant) screen locations, and Experiment 3 required externally-cued new or familiar oculomotor patterns to multiple screen locations in succession. Although eye movements were spontaneously reinstated when gaze was unconstrained during retrieval (Experiment 1), externally-cueing participants to re-engage in fixations or oculomotor patterns from encoding (Experiments 2 and 3) did not enhance retrieval. Across all experiments, participants' memories were well-described by signal-detection models of memory. Source retrieval was characterized by a continuous process, with evidence that source retrieval occurred following item memory failures, and additional evidence that participants partially recollected source, in the absence of specific item retrieval. Pupillometry provided an unbiased metric by which to compute receiver operating characteristic (ROC) curves, which were consistently curvilinear (but linear in z-space), supporting signal-detection predictions over those from dual-process theories. Implications for theoretical views of memory representations are discussed.
ContributorsPapesh, Megan H (Author) / Goldinger, Stephen D (Thesis advisor) / Brewer, Gene A. (Committee member) / Reichle, Erik D. (Committee member) / Homa, Donald (Committee member) / Glenberg, Arthur M. (Committee member) / Arizona State University (Publisher)
Created2012
Description
Spirituality has been studied in relation to psychological factors in health for the past decade and has been found to promote positive affect while possibly benefiting health. However, multiple dimensions of spirituality need to be examined systematically before much can be concluded regarding the influence of spirituality on health. One purpose of this study was to test the validity of the four factors of the Psychomatrix Spirituality Inventory (PSI) developed by Wolman using confirmatory factor analysis (CFA): divinity, mindfulness, extrasensory perception, and intellectuality. In addition, the moderation effects of these factors on stress, assessed by cortisol levels, and on perceived cold symptoms induced by a bogus cold viral challenge were investigated among 100 participants as part of a larger study conducted by Nemeroff to identify psychological factors related to perceived cold susceptibility under a bogus viral challenge paradigm. The analysis of CFA among 265 participants indicated that the four-factor Pyscholmatrix Spirituality model did not provide a good fit to the data collected by Nemeroff. The shared variances among factors could be the explanation for failure to confirm these four factors. Women developed more cold symptoms than did men post bogus exposure. Mindfulness and extrasensory perception factors buffered the adverse effects of stress on cold symptoms. A three-way-interaction among gender, stress, and mindfulness indicated that the buffering effects of mindfulness on stress and cold symptoms were stronger for women than for men, and the effects were stronger when the stress levels increased. A three-way-interaction was also found among gender, stress, and extrasensory perception, with the moderation effects of extrasensory perception on stress and cold symptoms stronger for women than for men, and these effects becoming stronger as stress levels elevated. This study is an important step for understanding the relationships among gender, spiritual factors and cortisol levels under laboratory-induced stress. These results have implications for developing preventions or interventions that incorporate mindfulness practices and take extrasensory perception beliefs into consideration for stress reduction and health promotion.
ContributorsChung, Kuo-Yi (Author) / Robinson Kurpius, Sharon E (Thesis advisor) / Nemeroff, Carol (Committee member) / Chen, Angela Chia-Chen (Committee member) / Kinnier, Richard (Committee member) / Arizona State University (Publisher)
Created2010