Which of these is an example of maturation? a. Participants ...

[Engineer]

Which of these is an example of maturation?
 
  a. Participants are 6 at the time of the pretest and 12 at the time of the posttest.
  b. Subjects are hungry at the time of the pretest and thirsty at the time of the posttest.
  c. Participants are sleepy at the time of the pretest but not at the time of the posttest.
  d. all of these

Question 2

Maturation is particularly a problem for research that deals with _____.
 
  a. therapy research c. perceptual research
  b. educational research d. a and b

[Edwyer]

Answer to Question 1

D
Maturation includes short-term as well as long-term effects.

Answer to Question 2

D
Both educational research and therapy research tend to record changes that take a long time to achieve; therefore they are particularly susceptible the problems associated with maturation.