Introduction in the field of Sensory science
3 important questions on Introduction in the field of Sensory science
3 examples of direct scaling techniques
- Category scale (5 points; 9 points)
- Grading system (Dutch: scale 1-10)
- Visual analogue scale (100 mm, you need ankers (not sweet at all vs extremely sweet)
3 examples of indirect scaling techniques
- Ranking (put it in order; Friedman -> test of systematic order)
- Triangle test (which one is different; Binomial test (is there a higher change than 0.33)
- Pairwise comparison (which one is sweeter?/which one do you prefer?; Binomial test (0.5)
What are the statistics of the scaling techniques?
- Triangle test/pairwise > nominal > no calculation, frequencies, binomial testing
- Ranking > Ordinal > No calculations, non-parametric tests, Friedman, Wilcoxon
- Grade (1-10); VAS; category scales > continuous > differences can be calculated (effect size); mean; SD; T-test; ANOVA; PCA
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