A researcher manipulated the intensity of light in increments of five lumens and asked participants if the light was present or absent.The study found that two particular participants had the same _____ threshold for perceiving the light.Had the investigators manipulated the light in units of one lumen,a difference would have been found between the individuals.The study was lacking the _____ to detect this difference.
A)absolute;significance
B)difference;validity
C)absolute;power
D)difference;reliability

Question

Quizplus · Accepted Answer

The first blank requires a term that indicates that the participants had the same threshold for perceiving the light regardless of the intensity level, which is absolute threshold. The second blank indicates that had the investigators manipulated the light in smaller increments, they would have been able to detect a difference between the individuals, which suggests that the study lacked the power to detect this difference. Therefore, the correct answer is (C) absolute; power. Neither significance nor validity nor reliability are fitting choices for the second blank.

A Researcher Manipulated the Intensity of Light in Increments of Five