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Executive Functioning and Working Memory as a Unitary Construct in Predicting Verbal Memory in Psychotic and Nonpsychotic Major Depression
Başlık:
Executive Functioning and Working Memory as a Unitary Construct in Predicting Verbal Memory in Psychotic and Nonpsychotic Major Depression
Yazar:
Posecion, Lainie F., author.
ISBN:
9780438025295
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (158 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Advisors: Rowena Gomez Committee members: Jennifer Keller; Tilman Schulte.
Özet:
Research in Psychotic Major Depression (PMD) and Major Depression without psychotic features (Non-Psychotic Major Depression; NPMD) have found deficits in executive function. Prior research suggested that executive function (EF) and working memory (WM) play large roles in verbal memory performance in these populations. To date, little consideration has been given to understanding if a construct known as executive attention can better explain the relationship between depression and memory. McCabe, Roediger, McDaniel, Balota, and Hambrick (2010) conceptualized executive attention that underlies both executive function and working memory capacity in a sample of healthy adults.
Using McCabe and colleagues (2010) model of executive attention (EA) and neuropsychological data (executive function, attention/working memory, verbal memory) this dissertation examined if EA can also be applied to a sample of 48 patients with PMD and 52 with NPMD. Measures WAIS III Digit Span Forward, Digit Span Backward, Letter Number Sequencing, Trails B (seconds), Stroop Color Word, Controlled Word Association Test FAS (phonemic), DKEFS Sorting Total Correct Sorts, Logical Memory I and II, CVLT-II Trials 1-5, Short and Long Delay Recall were used.
The factor analysis indicated that the working memory and executive function variables used could be forced into one factor (executive attention) that explained 45.36% of variance in the entire sample of PMD and NPMD. Consistent with past studies, Executive Attention significantly predicted memory performance in all verbal memory variables examined. NPMD had greater EA scores than PMD; however, there was no significant difference in the relationship between EA and any verbal memory variable. There were no significant differences between EA and EF or EA and WM in predicting verbal memory performance, suggesting that EA is as good a predictor of verbal memory performance as Working Memory Factor or Executive Function Factor, consistent with McCabe and colleagues (2010) findings.
This study had several limitations, including using an archival outpatient sample and limited demographic variables in the model. Future research could include additional variables such as gender and education in the model. Understanding the relationships among executive function, working memory, and verbal memory using more ecologically valid tests may help with clarity in neuropsychological evaluations.
Notlar:
School code: 1569
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
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XX(677926.1) | 677926-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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