A psychological evaluation gives a mental health provider a snapshot of your emotional state. The assessment looks at thinking, reasoning, and cognitive function. Also, the psychologist will note your mood, behaviors, daily functioning, and social interactions. Psychological evaluations are like medical tests. When a patient goes to a doctor with chronic pain, fatigue, or other symptoms, a medical doctor often orders tests to find out what is happening with the patient physically. Instead of tending to physical needs, a psychological evaluation observes and measures a persons behaviors, thoughts, and emotions to determine a diagnosis and appropriate treatment plan.