Which of the following standard scores is the least psychometrically sound?
A) Z-score
B) Percentile rank score
C) T-score
D) Age-equivalent score

Question

Quizplus · Accepted Answer

Age-equivalent scores are the least psychometrically sound because they only indicate the average age at which a particular score is typically obtained. However, they do not provide any information about the variation in scores within each age group. Therefore, age-equivalent scores are less reliable and less valid than the other standard scores listed. It is recommended to use other standard scores like Z-score, percentile rank score, or T-score for better reliability and validity.

Which of the Following Standard Scores Is the Least Psychometrically