There are various types of cognitive distortions, including:

a. all-or-nothing thinking, mental filtering, and operant conditioning.

b. personalization, overgeneralization, and unconditional positive regard.

c. all-or-nothing thinking, overgeneralization, and catastrophizing.

d. personalization, effectiveness, and catastrophizing.

There are two types of studies concerning how well psychotherapy works: _____ studies that focus on how well it works in a highly controlled study, and _____ studies that focus on how well it works with real clients and real therapists.