Answer:
Obsessive-Compulsive Disorder
Explanation:
Obsessive-Compulsive Disorder: In abnormal psychology, the term obsessive-compulsive disorder is also referred with OCD, and is described as a mental illness or mental health condition or disorder that encounters different people of various age groups and remains throughout the life.
An individual develops the obsessive-compulsive disorder when he or she gets to indulge in a cycle of obsessions (intrusive or unwanted thoughts that create distressing emotions) and compulsions (repetition of a particular behavior).
In the question above, Matthew's behaviors are most likely symptoms of obsessive-compulsive disorder.
