True or False: An independent-samples t-test is calculated the same for true IVs and quasi-IVs.

Psychology has been a science since

A) around 470 BC. B) the early 1600's. C) the late 1800's. D) the mid 1900's.

All aging changes are normal EXCEPT that they:

A) may be prevented if people take care of their health. B) progress gradually. C) involve physical deterioration. D) often become chronic disease at their extreme.