When two different instruments are used to measure the dependent variable in an experiment, what potential threat to internal validity may occur?

What is communication competence?

What will be an ideal response?

Which sentence below is an acceptable paraphrase of the statement, "I failed the test. I might as well drop out of school."

A) Don't feel so bad; you'll do better next time. B) If you had studied instead of going out the night before, you'd have done O.K. C) I've failed tests, too. I know how bad it feels. D) Because you failed the test, you feel like a failure in college.