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How Stress Affects Cognitive Abilities

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It is known that stress has a strong affect on individuals. A great deal of research has focused on how stress affects cognitive abilities. Sometimes the effect is impairment of ability to perform tasks within working memory (WM), which has received much less research. The current research proposes a study on how stress induced psychosocially affects college students abilities to perform an n-back WM task at both high and low loads. It is expected that stress will significantly impact performance on the task in both the low workload and high workload levels. Expected analysis will be a two-way ANOVA with planned comparison t tests. This research will advance current understanding on how WM is affected by stress and provide a basis for …show more content…

It activates the sympathetic nervous system and causes an increase in levels of the hormone glucocorticoids (GC) (Schoofs, Preuß, & Wolf, 2008). Otherwise known as cortisol in humans. GC levels are commonly used to determine if research participants are “stressed”(Newcomer et al., 1999). Working memory (WM) is a topic of study that has been researched far less with regard to the effects of stress. WM is the memory used in active thought, problem solving, and information manipulation (Schoofs et al., 2008). WM is dependent on the prefrontal cortex, which has a large number of GC receptors. Therefore, an increase in stress should result in an observable change in function (Oei et al., 2006). WM is usually tested with immediate recall of reading content, lists of numbers, letters, or images (Oei et al., 2006; Weerda et al. …show more content…

Vedhara et al. (2000) noticed that some tests of working memory were affected by stress while others were not. Visual and verbal WM were impaired and auditory WM was not. Further limitations to how stress affect WM were noticed when Oei et al. (2006) found that when participants stressed WM was significantly impaired during high workloads, but not during low WM loads. However, Schoofs et al. (2008) found that WM was impaired in both high and low workloads. They also discovered that the longer a task was performed the better participants did even when stressed. In research to find what makes working memory tasks so difficult under stressed conditions Weerda et al. (2010) used fMRI to isolate the effects of stress on WM to encoding and retrieval. It is known that working memory is affected by stress, however more research in the field is needed to discover to what extent and exactly how it is affected. The goal of this study is to broaden the current understanding of how stress affects WM. Participants will be exposed to a stress inducing situation or a controlled, non-stressful situation followed by a high or low load WM task. Achievement on the WM task along with a self-report will be examined to determine whether or not WM was affected and which process; encoding, maintenance, or retrieval, was affected most. It is hypothesized that stressed participants will perform worse

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