If the coefficient alpha for a stress scale was computed to be .80, the scale would be which of the following?
A) More reliable than a scale with an alpha of .50
B) A valid indicator of stress
C) Of indeterminate reliability until the scale's test–retest reliability was assessed
D) Of unacceptably low reliability
A
Feedback:
Internal consistency is evaluated by calculating coefficient alpha (or Cronbach's alpha). The normal range of values for this reliability index is from .00 to +1.00 . The higher the coefficient, the more accurate (internally consistent) the measure.
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