Your five-year-old nephew thinks about and understands the world differently than you do. This difference illustrates:

Simon is in his 50s and is completing a test that involves an

assessment of vocabulary as well as a timed test that requires Simon to put picture designs together. If we compare Simon's scores on these two tests to these same tests taken by Simon when he was 20, we would expect his a. score on the vocabulary test to have improved and his score on the picture design to have declined. b. score on the vocabulary test to have declined and his score on the picture design to have improved. c. his scores on both tests to have improved. d. his scores on both tests to have declined.

A "significant" correlation is one which

a. is especially meaningful b. does not deviate from zero c. indicates a valid difference d. can be generalized to the population