The fact that IQ scores have, on average, risen over the past century is called the effect. A. Cleckley
B. Flynn
C. Hare
D. Graves

B. Flynn

Explanation:

The fact that IQ scores have, on average, risen over the past century is called the "Flynn" effect.

The Flynn Effect simply refers to rise in intelligence test scores which was observed over time. It was carried out by Flynn when he had a study on Intelligent Quotient (IQ) scores. Flynn discovered that there was a rise from generation to generation.

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