Psychological assessment contributes important information to the understanding of individual characteristics and capabilities, through the collection, integration, and interpretation of information about an individual. Such information is obtained through a variety of methods and measures, with relevant sources determined by the specific purposes of the evaluation.

Sources of information may include

• Records (e.g., medical, educational, occupational, legal) obtained from the referral source;

• Records obtained from other organizations and agencies that have been identified as potentially relevant;

• Interviews conducted with the person being examined;

• Behavioral observations;

• Interviews with corroborative sources such as family members, friends, teachers, and others; and

• Formal psychological or neuropsychological testing.