A researcher records the amount of light it takes to detect a small visual stimulus in a dark room. Luminance is the variable being measured and may be thought of here as physical energy. What level of measurement is most likely involved in making this observation?
A) nominal
B) ordinal
C) interval
D) ratio

Question

Quizplus · Accepted Answer

Luminance, which involves measuring physical energy (in this case, light), is quantifiable in absolute terms, including a true zero point (no light). This characteristic aligns with the ratio level of measurement, which allows for the identification of differences, the establishment of order, and the calculation of ratios because it includes a true zero point.

A Researcher Records the Amount of Light It Takes to Detect