Moira checks her weight several times a day.One evening she steps on her bathroom scale and she is surprised when it is 6 pounds higher than her mid-day weigh-in.She steps on the scale again,but this time the weight is 2 pounds less.Puzzled,she steps on the scale again,only to find that she is 5 pounds lighter! Which of the following statements is true with regard to Moira's scale?
A) It lacks face validity
B) It lacks criterion validity
C) It lacks internal validity
D) It lacks reliability

Question

Quizplus · Accepted Answer

Moira's scale is lacking reliability because it is producing inconsistent results despite being used in the same way each time.

Moira Checks Her Weight Several Times a Day