This document discusses various perceptual mapping techniques used in marketing research: 1. Perceptual mapping allows companies to visually position brands on maps based on how customers perceive them along key attributes like quality, price, etc. This helps identify target customer segments. 2. Semantic scaling directly asks customers to rate brands on attributes using numeric scales. It provides attribute importance data but has limitations like constrained response scales. 3. Multidimensional scaling statistically derives perceptual maps from pairwise brand similarity rankings. It requires extensive interpretation of ambiguous results.