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The effect of high-intensity stress on learning.


- candidate number4327
- NTR NumberNTR1518
- ISRCTNISRCTN wordt niet meer aangevraagd
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR3-nov-2008
- Secondary IDs 
- Public TitleThe effect of high-intensity stress on learning.
- Scientific TitleVisuo-Spatial Learning Impairment Following Acute High-intensity Stress in Special Forces Candidates.
- ACRONYMLSSL
- hypothesisHigh-intensity stress reduces cognitive performance (visuo-spatial learning) both for immediate and delayed recall.
- Healt Condition(s) or Problem(s) studiedCognition, Stress
- Inclusion criteria1. Special Forces candidate (volunteer)
- Exclusion criteria1. Proper request or intervention by follow-up psychologist.
- mec approval receivedno
- multicenter trialno
- randomisedyes
- masking/blindingSingle
- controlNot applicable
- groupCrossover
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 17-nov-2008
- planned closingdate19-nov-2009
- Target number of participants40
- InterventionsTwo intervention conditions:
1. No-stress;
2. Stress.


Interventions: Digit Span test, 20 Pictures Free Recall test en Rey-Osterrieth Complex Figure test.
- Primary outcomeTask performance (visuo-spatial learning);
- Digit Span Test
- Rey-Osterrieth Complex Figure
- Modified Taylor Complex Figure
- Secondary outcomeStress questionnaire and psychphysiological stress measures (cortisol and cardio-respiratory)
- TimepointsData acquisition on 17 and 18 November 2008
- Trial web siteN/A
- statusopen: patient inclusion
- CONTACT FOR PUBLIC QUERIES John Taverniers
- CONTACT for SCIENTIFIC QUERIES John Taverniers
- Sponsor/Initiator Open University the Netherlands
- Funding
(Source(s) of Monetary or Material Support)
Open University, The Netherlands
- PublicationsN/A
- Brief summaryExperimental research on effects of acute high-intensity stress in real-life conditions is scarce. While running a specially designed selection procedure, Belgian Special Forces candidates (N = 27) were randomly assigned to a no-stress and a stress group. In a between-subjects field experiment 14 participants were exposed to a brusque and high-intensive mock prison of war (POW) exercise, while others performed a no-stress filler task. Subsequently, and in identical conditions for both no-stress and stress groups, cognitive performance was measured applying three standardized neuropsychological tests: the Digit Span test (WAIS III), a 21 pictures free recall test, and the Rey-Osterrieth Complex Figure test. Stress levels were assessed by glucocorticoids (cortisol) measurement during the cognitive performance tests, and subjectively by the NASA Talk Load Index (TLX).
- Main changes (audit trail)
- RECORD3-nov-2008 - 7-jan-2009


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