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It is not the case that Ordinal scales suffice when the research goal is categorical discrimination rather than magnitude estimation of acceptability differences.
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Reasons For
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Reason for
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1.
Acceptability judgments inherently involve magnitude reasoning; ordinal coding discards decision-relevant information about intensity or strength.
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2.
Categorical discrimination and magnitude estimation often serve the same research goal simultaneously; treating them as separate creates false dichotomy.
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3.
Ordinal limitation prevents detecting threshold effects and non-linear patterns that meaningful acceptability assessment requires.
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Reasons Against
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Reason against
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1.
Categorical discrimination requires only rank-ordering ability; ordinal scales preserve this ordering without unnecessary precision assumptions.
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2.
Interval/ratio scales invite false precision and inappropriate statistical tests when magnitude differences lack empirical meaning.
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3.
Research efficiency improves when measurement complexity matches analytical goals; overprecision wastes resources on unmeasurable distinctions.
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