Answer :
The 12-year-old would be described as having an IQ below average, as their performance on the Stanford-Binet test was comparable to that of an average 9-year-old.
An IQ (Intelligence Quotient) score is a measure of an individual's cognitive abilities compared to others of the same age group. In the given scenario, where a 12-year-old obtained a score on the original Stanford-Binet test that is typical of an average 9-year-old, it implies that the child's intellectual development is behind their chronological age.
Typically, IQ scores are calculated by dividing a person's mental age (MA) by their chronological age (CA) and multiplying by 100. However, since the given information does not provide the actual scores or specific calculations, we cannot determine the exact IQ score.
Nevertheless, it can be inferred that the child's IQ would likely fall below 100 since their performance on the test was on par with an average 9-year-old, which is below the expected level for a 12-year-old. An IQ score of 100 is considered average, reflecting intellectual abilities that align with the chronological age.
To summarize, based on the information given, the 12-year-old would be described as having an IQ below average, as their performance on the Stanford-Binet test was comparable to that of an average 9-year-old.
Learn more about Stanford-Binet test here
https://brainly.com/question/15077215
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