Spearman Inferred the Existence of a G Factor in Intelligence

question 132

Multiple Choice

Spearman inferred the existence of a g factor in intelligence from what evidence?​

• A)Mean performance on IQ tests has been rising from one generation to the next.
• B)​Scores on any intellectual test correlate positively with almost any other such test.
• C)​Scores on IQ tests are consistently higher in prosperous countries than in poor countries.
• D)​Children's scores on IQ tests correlate highly with those of their parents.

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Definitions:

Neurons

Nerve cells that are the basic building blocks of the nervous system, responsible for receiving, processing, and transmitting information through electrical and chemical signals.

Billion

A numerical value represented as 1,000,000,000 (in the short scale) or 1,000,000,000,000 (in the long scale, used traditionally in countries like France and Germany).

Human Being

A member of the species Homo sapiens, characterized by a capacity for language, reasoning, and the creation of complex cultures.

Myelin Sheath

The fatty layer enveloping axons of some neurons that increases the speed at which impulses propagate along the myelinated fiber.