The selection by maturation interaction problem can be minimized ...

[BRWH]

The selection by maturation interaction problem can be minimized by _____.
 
  a. measuring several characteristics of the subjects early in the research so that if they drop out, s/he can identify what kind of individuals they were
  b. having control groups who are at the same developmental stage as the subjects
  c. making the study easier to complete
  d. spend more time testing the participants

Question 2

Sex of children is an example of a(n) _________ scale.
 
  a. ratio c. ordinal
  b. nominal d. interval

[akpaschal]

Answer to Question 1

B
Comparison groups should be at the same stage of development so that the researcher can better assess the effects of the treatment.

Answer to Question 2

B