Increasing the number of items on a test makes it a better instrument according to which principle?
A) construct validation
B) operational definition
C) aggregation
D) incremental validation

Question

Quizplus · Accepted Answer

Increasing the number of items on a test generally makes it a better instrument according to the principle of aggregation. This principle suggests that the more items or observations you have, the more reliable and valid the measurement is likely to be, as it can more accurately represent the construct being measured.

Increasing the Number of Items on a Test Makes It