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Which arrangement is most suitable for objectively testing a watercolour technique?

Answer and explanation

Correct answer: Use the same paper, equal-sized samples, and change only one variable at a time

An objective comparison follows the controlled-variable principle. Keep the paper, sample size, pigment amount and working conditions as consistent as possible, then change only one factor, such as water quantity or brush method. Option C is correct because any observed difference can then be linked to that factor. Changing several materials together or keeping no records makes the result difficult to interpret or repeat.

Related tags

WatercolourControlled ExperimentVariablesArt TechniquePractical AssessmentPainting TechniquesArt EducationClass 9 Mcq

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