DO (IQ) 2

Question 1

A 10-year-old child scores 70 on a standardized IQ test. According to DSM-5 criteria, which additional finding is required to diagnose intellectual disability?

Accepted Answer

Deficits in adaptive functioning in at least one domain

Answer

DSM-5 requires both intellectual deficits AND deficits in adaptive functioning (conceptual, social, or practical domains) with onset during the developmental period.

Question 2

Which IQ test is most widely used for assessing adults aged 16–90 in clinical neuropsychological evaluations in the US?

Accepted Answer

Wechsler Adult Intelligence Scale (WAIS)

Answer

The WAIS (currently WAIS-IV) is the gold-standard adult IQ test used in clinical and neuropsychological settings.

Question 3

A patient's Full Scale IQ (FSIQ) score is 100. What percentile does this represent in a normally distributed population?

Accepted Answer

50th percentile

Answer

An FSIQ of 100 is the mean of the normative sample, corresponding to the 50th percentile by definition.

Question 4

Which condition is most commonly associated with an IQ in the moderate intellectual disability range (35–49)?

Accepted Answer

Down syndrome (trisomy 21)

Answer

Down syndrome typically produces IQ scores in the moderate range (35–70), though there is variability; it is the most common chromosomal cause of intellectual disability.

Question 5

A clinician uses the Flynn Effect to interpret an older IQ test score. What does the Flynn Effect describe?

Accepted Answer

Rising average IQ scores in populations over successive generations

Answer

The Flynn Effect refers to the observed rise of approximately 3 IQ points per decade across generations in many countries, requiring periodic renorming of tests.

DO - Doctor of Osteopathic Medicine Practice Test

DO - Doctor of Osteopathic Medicine Practice Test

DO (IQ) 2