What is the flynn effect? the observation that each generation has a significantly higher iq than the previous generation. the observation that each generation has a significantly lower iq than the previous generation. once a person knows his iq, he stops trying to excel academically. the idea that standard intelligence tests are flawed when they are used to compare ethnic groups?

The answer is "The observation that each generation has a significantly higher IQ than the previous generation".

The Flynn Effect is the general difference in intelligence quotient, ordinarily known as IQ, scores after some time in all people groups. The Flynn effect is named for James R. Flynn, who did much to record it and advance familiarity with its implications. The term itself was instituted by Richard Herrnstein and Charles Murray.