Mood-states, recall and subjective comprehensibility of medical information in non-patient volunteers

Factors were investigated related to the comprehensibility, recall and retention of medical information, using non-patient volunteers. At the first session, subjective comprehensibility, immediate recall and the mood-states of anxiety, depression and hostility were measured. A week later recall, anxiety, depression and hostility were reassessed. In terms of percentages of idea-units recalled, immediate recall was 44% and delayed recall was 31%. Immediate (though not delayed) recall and also subjective comprehensibility were negatively correlated with both anxiety and depression as measured at the first, but not the second session, thus highlighting the primacy of immediate mood-state in influencing recall. There was no relation between subjective comprehensibility and either of the recall scores. The results imply that subjective comprehensibility and recall are relatively independent, a result apparently inconsistent with Ley's model of compliance, but suggest that both can be influenced by depressed or anxious moods. Taken together with other findings, our results could support a curvilinear relation between anxiety and recall. To maximize recall and comprehensibility, at least within a certain range of anxiety levels, anxiety and depression at the time the instructions are presented should be minimized. In a clinical setting, this may be relevant to improving patient compliance.