Post-learning psychosocial stress enhances consolidation of neutral stimuli.
Post-learning stress has been reported to enhance memory consolidation in humans. This effect was observed in studies using physical stressors or an anticipatory speech task. In the present study 58 participants (28 females and 30 males) were exposed to a psychosocial stressor (Trier Social Stress Test) or a control condition following the presentation of neutral and emotionally arousing positive and negative pictures, which were accompanied by a brief narrative. The stressor induced a significant neuroendocrine stress response in men and women. In a 24h delayed free recall test the stress group showed an enhanced memory for neutral but not for emotionally arousing positive and negative items. Additionally, a significant correlation between the cortisol stress response and memory for neutral items was evident. Thus, in contrast to previous studies, post-learning stress primarily enhanced consolidation of neutral material. Several theoretical and methodological explanations for the observed effects are discussed.
Department of Cognitive Psychology, Ruhr-University Bochum, Bochum, Germany.
Diana
D
Preuss
Oliver T
OT
Wolf
D000328:Adult; D000339:Affect; D000704:Analysis of Variance; D004644:Emotions; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000032:analysis; D008297:Male; D011939:Mental Recall / Q000502:physiology*; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D012463:Saliva / Q000737:chemistry; D012938:Social Perception; D013315:Stress, Psychological / Q000503:physiopathology*; D011795:Surveys and Questionnaires; D013997:Time Factors; D055815:Young Adult; D000516:alpha-Amylases / Q000032:analysis
D000516:alpha-Amylases; D006854:Hydrocortisone