Intelligence scores are most likely to be stable over a one-year period for
a) a preschool student whose intelligence test score is 80.
b) first-grade student whose intelligence test score is 125.
c) third-grade student whose intelligence test score is 115.
d) fifth-grade student whose intelligence test score is 95.

D) A fifth-grade student whose intelligence test score is 95.

Explanation:

IQ is found to be the most stable characteristics of a psychometric test in our lifespan. Test and testing are two limiting factors that do not measure a real IQ. The best test provides the same IQ result of a person throughout his life span. The test which has strong validity and reliability can measure actual IQ. The result will be consistent. IQ tests measure person intellectual intelligence not that what they have learned and, how they do a task. It measures a person maximum capability. Many external factors affect the test result such as sickness, motivation level, distraction, low social-economic status, etc.