Effects of acquired brain injury on adaptive choice and the role of reduced sensitivity to contingencies.
The present investigation examined the proposal that brain injury reduces sensitivity to consequences. On a laboratory task, controls and subjects with brain injury made repeated choices between a small amount of money and a larger amount of money followed by a post-reinforcer delay of 3, 12, 18, or...
| Publicado en: | Brain Injury Vol. 16; no. 6; pp. 527 - 536 |
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| Autor principal: | |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Jun2002
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106794948&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106794948 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 02699052 B6W jtl: Brain Injury issn: 02699052 maglogo: Y pubinfo: dt: Jun2002 vid: 16 iid: 6 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106794948 2003015208 10.1080/02699050110113679 NLM12119088 106794948 ppf: 527 ppct: 9 formats: tig: atl: Effects of acquired brain injury on adaptive choice and the role of reduced sensitivity to contingencies. aug: au: Schlund MW affil: Kennedy Krieger Institute, 333 Cassell Dr., Triad Technology Building Suite 4200, Baltimore, MD 21224; schlund@kennedykrieger.org sug: subj: Brain Injuries Psychosocial Factors Decision Making Adaptation, Psychological Experimental Studies Reinforcement (Psychology) Neuropsychological Tests Mann-Whitney U Test Descriptive Statistics P-Value Age Factors Sex Factors Male Female Adult Middle Age Human Adult: 19-44 years Middle Aged: 45-64 years Male Female ab: The present investigation examined the proposal that brain injury reduces sensitivity to consequences. On a laboratory task, controls and subjects with brain injury made repeated choices between a small amount of money and a larger amount of money followed by a post-reinforcer delay of 3, 12, 18, or 24 seconds. Increasing delays lowered reinforcement densities (i.e. money available per minute) associated with large reinforcers. Consequently, choosing large reinforcers became less adaptive. Results showed subjects with brain injury made less adaptive choices and earned significantly less money than controls, because of a preference for large reinforcers with low reinforcement densities. Maladaptive choice was not attributable to deficits in discriminating reinforcer magnitudes or delays. Results suggest individuals with brain injury may remain sensitive to consequences but fail to discriminate among significant response-consequence relations (i.e. contingencies). This view, emphasizing basic learning processes, may account for some problems in skill acquisition and adaptive choice. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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