Assertion: person | /r/CapableOf | show poor immune function
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text: An individual with a propensity to blame failure on themselves and success on external factors shows more severe helplessness deficits such as passivity, depression, poor problem solving, low self-esteem, poor immune function, and even higher morbidity than a person who explains failure as being due to extraneous factors (Maier & Seligman, 1976; Peterson, 1988).