Final answer:
DBT's three theoretical foundations are Cognitive-Behavioral Therapy, which focuses on changing negative thought patterns; Zen Buddhist philosophies, which encourage mindfulness and acceptance; and Dialectical Philosophy, which emphasizes the balance between acceptance and change.
Step-by-step explanation:
The three theoretical foundations of Dialectical Behavior Therapy (DBT) are Cognitive-Behavioral Therapy (CBT), Zen Buddhist philosophies, and Dialectical Philosophy. CBT is used within DBT to help individuals identify and change negative thinking patterns and behaviors. Zen Buddhist philosophies contribute to the acceptance and mindfulness strategies of DBT, encouraging individuals to accept the present moment and their thoughts without judgement. Lastly, Dialectical Philosophy underpins the central DBT principle of finding a balance between acceptance and change, typified by the therapy's focus on the synthesis of opposites to resolve internal conflicts.