A psychologist develops a new test of numerical ability. He correlates this test’s scores of the students with the marks obtained by them in mathematics in their examination held recently. The correlation is quite high. This indicates

Correct option is E

1. Predictive validity refers to how well a test predicts future performance or outcomes. In this case, the high correlation between the new test scores and the students' mathematics marks suggests that the test is a good predictor of future performance in mathematics.
2. Internal consistency refers to how consistently the items on the test measure the same construct, which is not being assessed here.
3. Test-retest reliability refers to the stability of test results over time, which is also not being measured here.

Information Booster
● Reliability vs Validity: Reliability refers to the consistency of the test results, while validity refers to how well the test measures what it is supposed to measure.
● Internal Consistency: It is typically assessed using statistics like Cronbach’s alpha, which measures how well the items on a test correlate with each other.
● Test-Retest Reliability: This is typically measured by administering the same test to the same group of individuals at two different times and correlating the results.
● Math Scores as Criterion: The use of math scores as a criterion for validity testing shows that the new test is likely measuring something relevant to mathematics ability.