After birth newborns generally lose approximately 10% of their birth weight in fluid loss. How long does it take to gain it back?

According to the biological process perspective,

a. personality is purely genetic. b. all nervous systems function the same way. c. nervous system processes, but not hormonal processes, influence personality. d. both nervous system and hormonal processes influence personality.

Ralph wants to examine group-related changes as well as age-related changes as a function of time. Which quasi-experimental design would be most appropriate for him to use?

a. nonequivalent-groups design b. time-series design c. longitudinal design using cohorts d. single-case experimental design