The goal of this 5-year project is to discover the specific mechanisms that underlie the attention and working memory deficits that are central features of schizophrenia. These impairments contribute to the functional disability of the disorder, are likely related to genetic risk for the illness, and are largely unaffected by antipsychotic treatment. This translational research program involves collaboration between a clinical research laboratory and a team of basic cognitive scientists with expertise in attention and working memory. Our approach is to use the concepts and methods of contemporary cognitive neuroscience to subdivide the constructs of attention and working memory into individual subcomponents so that specific, falsifiable hypotheses can be constructed. The proposal includes 4 interrelated specific aims.
In Aim 1, we examine the hypothesis that the illness compromises the ability to use goals to control attention, leading to deficits in perception, working memory and response selection.
In Aim 2, we examine the interactions of attention and working memory and examine how impairments in each impact the other system.
In Aim 3, we test the hypothesis that the illness compromises the ability to rapidly form precise working memory representations, thereby degrading behavioral performance.
In Aim 4, we address individual differences in working memory and attentional performance among patients in order to determine whether patients vary along a single severity of impairment continuum or instead, differ in kind. Behavioral and neurophysiological experimental paradigms were chosen for their ability to isolate specific attention and working memory processes, yielding large, distinctive patterns of results in normal subjects, thereby increasing the opportunity to observe specific, interpretable deficits in SC. These data will provide new insight into the cognitive/neural systems that are impaired in SC, potentially clarifying the nature of the phenotype, and provide new targets for pharmacological treatment.

Public Health Relevance

Most patients with schizophrenia suffer from significant disability for most of their adult lives. Impairments in attention and working memory have been shown to play an important role in determining the extent of disability that patients experience. This research program is designed to increase understanding of the specific processes that are involved in these important areas of cognitive impairment.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Research Project (R01)
Project #
5R01MH065034-10
Application #
8240083
Study Section
Adult Psychopathology and Disorders of Aging Study Section (APDA)
Program Officer
Shoham, Varda
Project Start
2001-09-27
Project End
2013-03-31
Budget Start
2012-04-01
Budget End
2013-03-31
Support Year
10
Fiscal Year
2012
Total Cost
$666,846
Indirect Cost
$156,861
Name
University of Maryland Baltimore
Department
Psychiatry
Type
Schools of Medicine
DUNS #
188435911
City
Baltimore
State
MD
Country
United States
Zip Code
21201
Leonard, Carly J; Balestreri, Angela; Luck, Steven J (2015) Interactions between space-based and feature-based attention. J Exp Psychol Hum Percept Perform 41:6-Nov
Lim, Sukbin; Goldman, Mark S (2014) Balanced cortical microcircuitry for spatial working memory based on corrective feedback control. J Neurosci 34:6790-806
Kiwanuka, Jacqueline N; Strauss, Gregory P; McMahon, Robert P et al. (2014) Psychological predictors of functional outcome in people with schizophrenia. Schizophr Res 157:299-304
Leonard, Carly J; Robinson, Benjamin M; Hahn, Britta et al. (2014) Enhanced distraction by magnocellular salience signals in schizophrenia. Neuropsychologia 56:359-66
Gray, Bradley E; Hahn, Britta; Robinson, Benjamin et al. (2014) Relationships between divided attention and working memory impairment in people with schizophrenia. Schizophr Bull 40:1462-71
Luck, Steven J; McClenon, Clara; Beck, Valerie M et al. (2014) Hyperfocusing in schizophrenia: Evidence from interactions between working memory and eye movements. J Abnorm Psychol 123:783-95
Johnson, Melissa K; McMahon, Robert P; Robinson, Benjamin M et al. (2013) The relationship between working memory capacity and broad measures of cognitive ability in healthy adults and people with schizophrenia. Neuropsychology 27:220-9
Gray, Bradley E; McMahon, Robert P; Gold, James M (2013) General intellectual ability does not explain the general deficit in schizophrenia. Schizophr Res 147:315-9
Luck, Steven J; Vogel, Edward K (2013) Visual working memory capacity: from psychophysics and neurobiology to individual differences. Trends Cogn Sci 17:391-400
Lim, Sukbin; Goldman, Mark S (2013) Balanced cortical microcircuitry for maintaining information in working memory. Nat Neurosci 16:1306-14

Showing the most recent 10 out of 35 publications