Final answer:
A market researcher who uses multidimensional scaling (MDS) will ask respondents to evaluate product or brand pairs in terms of similarity.
Step-by-step explanation:
A market researcher who uses multidimensional scaling (MDS) will ask respondents to evaluate product or brand pairs in terms of similarity. MDS is a statistical technique used to analyze perceptual data and represent it in a low-dimensional space. By asking respondents to evaluate similarity, the researcher can understand how consumers perceive the relationships between different products or brands.