Theses and Dissertations from UMD

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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

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Author: search.filters.author.Rollins, Leslie Ann HainleySubject: search.filters.subject.Development

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    Development of subjective and objective recollection: Evidence from event-related potentials
    (2014) Rollins, Leslie Ann Hainley; Riggins, Tracy; Psychology; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Memory, particularly memory for contextual details (i.e., recollection), undergoes significant development from middle childhood to young adulthood. This research examined the development of recollection utilizing participant's subjective reports as well as their objective accuracy for two contextual details (i.e., the color of the item and a semantic judgment made during encoding). The aims of the present studies were to examine age-related differences in subjective and objective recollection, the correspondence between these abilities, and their neural correlates. Participants included 6- to 8-year-old children, 12- to 13-year-old adolescents, and young adults. Event-related potentials (ERPs) were recorded during the encoding (Study 1) and retrieval (Study 2) portions of a memory paradigm. Age-related improvements in objective and subjective recollection were found in both studies. At encoding, ERP indices of recollection were present when recollection was indexed subjectively or by accuracy for the semantic judgment made during encoding. In contrast, ERP responses were not sensitive to recollection when memory for color was used as the measure of recollection. ERP effects associated with recollection at encoding were not influenced by age. This finding suggests that children, adolescents, and adults process items similarly at the encoding stage. During retrieval, a recollection effect was only present when recollection was indexed by subjective judgments. Further, this effect was influenced by participant age. The effect was absent in children, topographically widespread in adolescents, and, consistent with previous literature (for review see Rugg & Curran, 2007), maximal over left centro-parietal leads in adults. Collectively, these findings suggest that ERP effects associated with recollection may be more apparent using subjective versus objective measures and that improvement in memory performance from middle childhood to adulthood is primarily attributable to the development of consolidation, storage, or retrieval processes.
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    INFLUENCE OF EXECUTIVE FUNCTIONING ON MEMORY FOR CONTEXTUAL DETAILS AND FALSE RECOGNITION
    (2012) Rollins, Leslie Ann Hainley; Riggins, Tracy; Psychology; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    No previous studies had examined how all constructs of executive functioning (i.e., conflict inhibition, delay inhibition, cognitive flexibility, and working memory) relate to memory for contextual details and false recognition in early childhood controlling for general intelligence. Three and six-year-old children performed a laboratory-based episodic memory task and a battery of neuropsychological tasks. The relation between executive functioning and false recognition was diminished taking general intellectual ability into account. Executive functioning did not predict memory for contextual details in the full sample. However, when children who were at chance at recalling contextual details were excluded from analysis, executive functioning showed a trend for accounting for variance beyond age group and general intellectual ability. The inability of this effect to reach conventional statistical significance was likely due low statistical power resulting from the sample size reduction. Specifically, accuracy on the day/night task, a measure of conflict inhibition, was a significant predictor.