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9 Cards in this Set
- Front
- Back
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What was the aim of Cohen et al.'s research?
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To investigate the role of general life stress on susceptibility to common cold virus
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What was the procedure?
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- 394 participants completed questionnaires on number of stress life events experienced in previous year
- Rated degree of stress and level of negative emotions i.e. depression - Scores combined to create stress index |
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What happened after the participants had answered the questionnaires and rated their stress and so on?
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Exposed to common cold virus - 82% became infected with virus
Those who had developed a clinical cold were recorded |
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What were the findings?
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Significant correlation between stress index scores and likelihood of developing a cold i.e. failing to fight infection
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What did Cohen et al. conclude from these findings?
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Life stress and negative emotions reduce immune system effectiveness thus increasing participants susceptibility to infection
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What is one methodological issue in regards to the study being indirect?
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As the study was indirect immune function wasn't directly measured
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Which study is supportive of this research?
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Evans and Edgerton (1991)
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Why is the Evans and Edgerton (1991) study supporting of Cohen et al. (1993)? What was it they found?
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Significant correlation between probability of developing a cold and negative events in preceding days
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What is another methodological issue with Cohen et al.'s research in regards to variables?
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Independent variable (stress index) wasn't directly manipulated because it's a correlational study and therefore a cause and effect relationship cannot be confirmed. Therefore, high-stress participants could have been susceptible to colds as a result of socioeconomic factors i.e. drinking, smoking, poor diet
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