Dr. Jefferson is a psychologist interested in 4-year-old Shawn's knowledge of the differences between animals and vehicles. The psychologist gives Shawn a multiple-choice picture test in which he must write the letter of the correct answer on a separate piece of paper. However, Shawn has trouble identifying and writing some letters. On two separate occasions, Shawn receives the same score on the test. This method has _____ validity and _____ reliability.
A) good; good
B) good; poor
C) poor; good
D) poor; poor

Question

Quizplus · Accepted Answer

The fact that Shawn has trouble identifying and writing some letters suggests that the test may have poor validity because his difficulty with the writing aspect could be confounding his ability to answer accurately. However, the fact that he received the same score on two separate occasions suggests good reliability, as he is consistently achieving the same score.

Dr Jefferson Is a Psychologist Interested in 4-Year-Old Shawn's Knowledge