Charles Spearman Inferred the Existence of a "G" (Or General)

question 75

Multiple Choice

Charles Spearman inferred the existence of a "g" (or general) factor in intelligence from the observation that

• A) people's scores on intelligence tests correlate highly with measures of the size of their cerebral cortex.
• B) people who score high on a test one day are likely to score high again if they take the same test another time.
• C) people who do well on a test of one kind of intellectual ability generally do well on tests of other kinds also.
• D) the mean score on intelligence tests is the same in all countries.

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Definitions:

X-rays

A form of electromagnetic radiation used in medical imaging to create pictures of the inside of the body, especially bones.

Ultrasound

A diagnostic imaging technique using high-frequency sound waves to create images of the inside of the body.

Radiopharmaceuticals

Radioactive compounds used in medical diagnosis or treatment, particularly in imaging and cancer therapy.

Radiopaque

Describes substances that do not allow X-rays or similar radiation to pass through, appearing white or light on radiographic images, thus helping in the diagnosis of various conditions.