Continuing Intelligence: Evaluating IQ Tests E3

What are the three criteria used to judge the quality of IQ tests?

Reliability, validity, and bias.

What does reliability in IQ testing refer to?

Reliability refers to the consistency of test scores over time.

What is test-retest reliability?

It measures how well the test predicts its own score across two separate testing days.

What correlation value indicates high test-retest reliability in IQ tests?

A correlation of about .95.

How is predictive validity defined in the context of IQ tests?

Predictive validity is the ability of the test to predict future outcomes it was designed to predict.

What is the typical correlation between IQ and GPA?

A correlation of +.40.

What does bias in IQ testing refer to?

Bias refers to the test working differently for different groups, which is undesirable.

What is item bias?

Item bias exists when individual test items are harder for one group than another, despite having the same IQ score.

What is predictive bias?

Predictive bias occurs when IQ scores predict outcomes differently for majority vs minority groups with the same IQ score.

Do major IQ tests show item bias?

No, major IQ tests do not show item bias as test makers pretest items and remove biased ones.

What is the procedure to check for item bias?

Majority and minority groups take the same IQ test, and their performance on each item is compared for individuals with the same total IQ.

What finding indicates no predictive bias in IQ tests?

If individuals with the same IQ have similar outcomes across groups.

What is the significance of the correlation between IQ scores and later outcomes?

It indicates the predictive validity of the IQ test.

What is the role of modern IQ tests regarding bias?

Modern IQ tests show low to no bias.

What is the importance of validity in IQ tests?

Validity ensures that the test measures what it is supposed to measure, such as mental ability.

What does a high correlation between IQ scores and job performance indicate?

It indicates that the IQ test has predictive validity for job performance.

What is the procedure to check for predictive bias?

Compare later outcomes (GPA, job performance) for individuals with the same IQ from different groups.

What does it mean if a test has high reliability?

It means that scores remain stable across time and testing.

What are Wechsler and Stanford Binet known for?

They are the most widely used individually administered IQ tests.

What is the finding regarding average IQ differences across groups?

Average IQ differences do not disappear, as they may be influenced by outside factors like school quality and discrimination.

What is the correlation value that indicates high reliability for Wechsler and Stanford Binet tests?

.95