A nurse researcher is evaluating a revised self-esteem ...

[leilurhhh]

A nurse researcher is evaluating a revised self-esteem questionnaire to determine whether all of the items on the questionnaire actually effectively measure self-esteem. Which aspect of reliability is she evaluating?
 
  A) Equivalence
  B) Validity
  C) Stability
  D) Internal consistency

Question 2

In a nonequivalent-control-group design, the most serious threat to internal validity is:
 
  A) Testing
  B) Selection
  C) Maturation
  D) History

[spencer.martell]

Answer to Question 1

D
Feedback:
An instrument is internally consistent to the extent that its items measure the same trait. Internal consistency reliability is the best way to assess an important source of measurement error in scales, the sampling of items. Internal consistency is evaluated by calculating coefficient alpha (Cronbach's alpha). The higher the coefficient, the more accurate (internally consistent) the measure.

Answer to Question 2

B