One problem in using a cross-sectional design in developmental ...

[D2AR0N]

One problem in using a cross-sectional design in developmental research is that
 
  a. sample attrition is likely to occur.
  b. there may be a cohort effect.
  c. there may be carryover effects.
  d. there may be a history effect.

Question 2

Averaging over two or three consecutive observations is one method for dealing with ____.
 
  a. trends in the data
 b. phase changes
 c. unstable data
 d. a treatment that has a relatively small effect

[peter]

Answer to Question 1

B

Answer to Question 2

c