To study how members of a particular group change or remain the ...

[EY67]

To study how members of a particular group change or remain the same as they grow older, the best method is:
 
  cross-sectional research.
  a survey at the end of the time period.
  longitudinal research.
  establishing an experimental group and a control group.

Question 2

Which of the following is a common difficulty in cross-sectional research?
 
  There are too many variables to keep track of.
  Longitudinal changes are not easily measured.
  Cohort differencesthat is, differences in background variables.
  Cultural differences.

[thall411]

Answer to Question 1

longitudinal research.

Answer to Question 2

Cohort differencesthat is, differences in background variables.

[EY67]

Thank you

[thall411]

No problem