Questions: Clinical Assessment and Diagnosis

Question 1

A clinician administers an intelligence test, conducts a clinical interview, and reviews school records before forming a diagnostic impression. Which principle of assessment does this approach best illustrate?

• A. Incremental validity
• B. Multimethod assessment
• C. Confirmatory bias avoidance
• D. Normative referencing

Answer: (B)

Multimethod assessment means gathering data from multiple sources and instruments to build a more complete and valid picture of the client. No single method captures all relevant information — tests measure certain cognitive or personality dimensions; interviews reveal context, history, and interpersonal presentation; records provide longitudinal perspective. Converging findings across methods strengthens confidence in conclusions.

Question 2

A psychologist who identifies a likely diagnosis after the initial interview should now select assessment instruments specifically designed to confirm that diagnosis.

• T. True
• F. False

Answer: False

Selecting instruments to confirm a hypothesis introduces confirmatory bias, which undermines assessment validity. Good clinical assessment uses instruments chosen to comprehensively evaluate the client's functioning — including ruling out alternative explanations. Early impressions should sharpen the hypotheses being tested, not narrow the assessment to a single conclusion.

Question 3

Why is clinical assessment described as guiding diagnosis rather than being diagnosis itself?

Model answer: Assessment produces data — test scores, interview observations, behavioral records — but diagnosis requires clinical judgment to interpret that data in light of diagnostic criteria, rule out alternative explanations, account for cultural context, and integrate multiple imperfect sources of information. A test score alone is not a diagnosis; the clinician synthesizes the assessment findings into a diagnostic formulation.

This distinction protects against over-reliance on any single instrument or score. Psychological tests have error, cultural biases, and limited scope. The clinician's role is to weigh the evidence across methods, recognize limits of each instrument, and exercise judgment — not to read a diagnosis off a score sheet.