What is the leading need for hospice care?

An advantage of a sequential study is that

A) it allows researchers to identify age-related changes and differences. B) it prevents participants from dropping out of the study. C) research participants are more likely to give an honest answer during the study. D) it prevents participants from becoming test-wise.

If you wanted to see if behavior changes over time, you could make multiple measurements of a group of participants every month for a year,

inserting your manipulation after three months (or any time you chose) and seeing if change occurred. Such a design would involve a a. static-group comparison design. b. one-group pretest-posttest design. c. nonequivalent control group design. d. interrupted time series design.