Abstract
This study provides evidence for a positive relationship between trustworthiness and physiological arousal. The importance of this relationship lies in previous research firmly establishing the relationship between physiological arousal and differential performance on long-term and short-term memory tasks. Previous studies that have failed to find a relationship between credibility and retention of information have also failed to differentiate between short-and long-term memory tasks and varying levels of arousal due to differential trust of sources. The data of this study suggest it is necessary to consider the arousal-retention relationship as influenced by source trustworthiness in studies of credibility and information retention.