Discussion
Consider the following statements about observers in industry.
1. Screening removes observers with a colour vision deficiency.
2. A panel of observers averages out normal variation.
3. Screened observers all give identical colour judgements.
Answer: D
The first two are correct and are standard practice. The third is not so, since normal observers still differ measurably from one another. Screening removes deficiency but not variation. Normal observers still differ from one another.
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