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Frage | Antworten |
Kiecolt-Glaser et al (1984) | Stress and the Immune System Natural Experiment 75 medical students Took blood one month before then during exams Immune function was assessed by measuring T Cell activity in the blood samples Students also given questionnaire to assess psychological variables such as life events and loneliness Found that stress is linked to immunosuppression |
Opportunity Sample | Subjective - choice (researcher may choose particular people to steer their results in the desired direction) |
Repeated Measures | Overcome by counterbalancing |
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