Janelle recently completed a new test that was designed to measure her IQ. She took the test twice and each time received the same score. The test administrator told her that her scores indicate she is extremely intelligent. However, Janelle scored well below average when she completed the Stanford-Binet and the Wechsler Adult Intelligence Scale (WAIS), two well-established intelligence tests. Based on this pattern of results, it appears that the new measure of IQ was a
A) valid measure of intelligence.
B) valid but unreliable measure of intelligence.
C) reliable but not valid measure of intelligence.
D) more accurate measure of intelligence than the Stanford-Binet or the WAIS.

Question

Quizplus · Accepted Answer

The new test consistently gave Janelle the same score across two attempts, indicating it is reliable (it produces consistent results). However, because her scores on the new test significantly differ from her scores on established intelligence tests (Stanford-Binet and WAIS), it suggests the new test may not be accurately measuring what it claims to measure (intelligence), indicating a lack of validity.

Janelle Recently Completed a New Test That Was Designed to Measure