Validity & Reliability

A study the produces the same results each time is conducted is said to be

• valid

• internally valid

• externally valid

• reliable

Angela designed a test to measure the IQ of her students. The test included a mathematical skills section and scientific knowledge section. When her students completed the test, she noticed that the students who had very strong English skills performed quite poorly on the test. She had the students complete the test again three weeks later. The results achieved by the students were very similar both times the test was taken. She concluded that the test needed to be revised as it did not measure IQ but, instead, measured only mathematical ability and scientific knowledge. Therefore, this test would be said to have

• high reliability and validity

• low reliability and validity

• high reliability and low validity

• high validity and low reliability

A test that effectively measures the effect that an IV has on the DV under different conditions at different times is said to be

• Correct

• Valid

• Reliable

• Both valid and reliable

The term _____ is used to describe how close the results are to each when an experiment is repeated under changed conditions

• Reproducibility

• Repeatability

• Replicability

• Precision

The term _____ is used to describe the degree to which an experiment obtains similar results whenever repeated under the same conditions.

• Reproducibility

• Repeatability

• Replicability

• Precision