Anxiety (Zuckerman, 1960) and Depression (Lubin, 1965) checklists were administered to 73 psychiatric patients. Correlations with three psychiatrists' ratings and Ss' self-ratings on four affects (anxiety, depression, hostility, cheerfulness), as well as correlations between various checklist scores, were obtained. In addition, means of groups classified according to predominant affect were obtained. Both types of analyses indicate that anxiety and depression are difficult to differentiate, whereas both can be reliably separated from hostility and cheerfulness. Motivational and theoretical factors relevant to the anxiety-depression-hostility discrimination are discussed.
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