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Psychology

Theses/Dissertations

Memory

University of Iowa

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The Neural Correlates And Temporal Dynamics Of Cued Fear Generalization, Kelsey Nicole Wilson Aug 2019

The Neural Correlates And Temporal Dynamics Of Cued Fear Generalization, Kelsey Nicole Wilson

Theses and Dissertations

Fear generalization, the generalization of fear to innocuous stimuli, is a characteristic component of pathological anxiety. For example, after returning from war, a person might begin to experience fear in response to the sound of fireworks, a stimulus typically regarded as safe. When excessive, “overgeneralization” serves as a core feature of fear and anxiety-related disorders, such as PTSD. The present collection of studies sought to investigate the neural correlates and temporal dynamics of fear generalization in humans.

The first study sought to investigate the causal role of the ventromedial prefrontal cortex (vmPFC) and hippocampus in the generalization of fear. Contrary ...


The Effect Of Recent Experience On Template Formation During Categorical Visual Search, Kenneth Eduardo Granillo-Velasquez Jan 2018

The Effect Of Recent Experience On Template Formation During Categorical Visual Search, Kenneth Eduardo Granillo-Velasquez

Honors Theses at the University of Iowa

Previous studies have shown that while searching for categorical objects (e.g. cars, clothing, fruits, etc.), we utilize a template as a reference to aid in our detection and identification of our target object. Even more, other research has proposed the capacity of this template to accommodate or modify based on the exemplars presented for that categorical group. In addition, they have shown the capacity of these same exemplars to broaden or further specify the template used during these searches. However, these findings do not consider the effect that recent exemplars have on existing templates. In the following experiment, we ...


The Effects Of Music On Short-Term And Long-Term Memory, Alexandria Miller Jan 2017

The Effects Of Music On Short-Term And Long-Term Memory, Alexandria Miller

Honors Theses at the University of Iowa

Recent research has suggested that there could be a benefit for learning verbal information with songs rather than spoken word; also, retrieval practices have been well documented as a beneficial learning strategy. The interaction between the two, however, has not been investigated. In this project, undergraduate students were assigned to one of four groups and listened to several complex sentences. Two groups had sentences that were spoken (Speech-Restudy, and Speech-Retrieval) and two had sentences that were sung (Song-Restudy, and Song-Retrieval). The restudy groups listened to the sentences four times, whereas the retrieval groups listened to the sentences twice, and then ...


Memory Mechanisms Of Hand Gesture In Communication And Learning, Caitlin Ann Hilliard Aug 2016

Memory Mechanisms Of Hand Gesture In Communication And Learning, Caitlin Ann Hilliard

Theses and Dissertations

Spontaneous co-speech hand gestures robustly affect learning and memory. Viewing or producing hand gestures during conversation facilitates the encoding, consolidation, and retention of the information in speech. Despite these effects, the cognitive and neural mechanisms supporting this relationship remains unknown. In Experiment 1, I explored the memory mechanisms supporting hand gesture by working with patients with damage to their hippocampus and thus their declarative memory system. Participants engaged in discourse tasks that disproportionately engaged the hippocampus. I found that patients gestured less overall than healthy comparisons across all tasks, suggesting that the hippocampus indeed plays a role in gesture production ...