In a now-famous study, Rosenthal and Jacobson found that randomly selected elementary school students experienced a spurt in IQ score largely as a result of

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The study by Rosenthal and Jacobson found that the students' elevated IQ scores were largely due to their teachers' elevated expectations, which may have influenced the teachers to provide more challenging and stimulating instruction. This phenomenon is known as the Pygmalion Effect or self-fulfilling prophecy, where high expectations can influence performance positively.

In a Now-Famous Study, Rosenthal and Jacobson Found That Randomly