What condition is diagnosed by evaluating a score of 69 or less on an IQ test?

A score of 69 or less on an IQ test indicates an intellectual disability, which is characterized by limitations in intellectual functioning and adaptive behavior. Intellectual disability encompasses a range of conditions that affect mental functioning, communication, self-care, and social skills. The criteria for diagnosing intellectual disability include not only the IQ score but also the impact on daily functioning and the onset during developmental periods.

The other conditions mentioned can involve varying degrees of cognitive and developmental challenges but are not specifically defined by an IQ score. Autism pertains to a range of social communication and behavioral concerns rather than a specific IQ score threshold. Down syndrome is a genetic condition that may be associated with intellectual disability but is not diagnosed solely based on IQ. Cerebral palsy involves physical movement and coordination difficulties but does not correlate directly with intellectual measurements, as individuals with this condition can have varying levels of cognitive ability. Thus, the direct link between an IQ score of 69 or less and the diagnosis of intellectual disability makes it the correct choice.