A Common Unit of Illumination Intensity Is Called a Footcandle

question 3

Multiple Choice

A common unit of illumination intensity is called a footcandle and is equal to

• A) the amount of light one foot away from a candle.
• B) the amount of light from a one-foot long candle.
• C) one lumen distributed over an area of 1-square-foot.
• D) none of the above

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Definitions:

Construct Validity

The degree to which a test measures what it claims, or purports, to be measuring.

Criterion Validity

The extent to which a measure is related to an outcome or criterion that it is supposed to predict.

Internal Consistency Validity

A measure of the reliability of a test or scale, indicating how well the items on the test measure the same construct or concept.

Content Validity

The extent to which a test measures all aspects of the concept or content it intends to measure.