The two main objectives of this research were to determine whether Type A cognitions are related to a broader range of symptoms than has traditionally been studied and to determine possible mediating variables. Past research and theory suggest that Type A individuals not only experience but also generate stress and interpersonal conflict (i.e., in keeping with a psychosocial vulnerability model). This psychosocial vulnerability may put Type A individuals at greater risk of experiencing a wide array of physical and psychological symptoms well beyond coronary heart disease (CHD), the health outcome typically investigated. Stress, interpersonal and non-interpersonal in nature, and perceived social support, were explored as possible mediators in the Type A cognition-symptoms relationship using structural equation modelling (SEM) in a university sample. Non-interpersonal stress and interpersonal stress mediated both the Type A cognition-psychological symptoms relationship and the Type A cognition-physical symptoms relationship. However, perceived social support only mediated the Type A cognition-psychological symptoms relationship. Results indicate that Type A individuals may experience psychosocial vulnerability, particularly reporting stress, which may put them at risk for the experience of negative health outcomes. Implications for cognitive therapy are discussed.
