Experimentally unpacking cognitive behavioral therapy: The effects of completing a thought record on affect and neuroendocrine responses to stress.

Despite overall effectiveness of cognitive behavioral therapy (CBT), little is known about the effects of specific techniques used in CBT. Thought records are widely employed in CBT across disorders to target cognitions. The current study examined the effects of thought record completion on affective and physiological responses to a laboratory stressor. Participants underwent the Trier Social Stress Test (Kirschbaum & Hellhammer, 1993) and were randomized to a thought record condition (n = 50) or a control condition (n = 50). Affect and biological responses (i.e., cortisol, dehydroepiandrosterone, and alpha-amylase) were collected throughout the session. Participants in the thought record condition showed greater peak cortisol response following the stressor. No between group differences were found on other neuroendocrine or affect measures. Overall, results indicate completing a thought record impacts physiology (i.e., cortisol) and using experimental laboratory methods can provide additional information to inform our understanding of the components of CBT.