Part 1: Common Knowledge: Anutomatic Cluster Analysis. Automatic Cluster Analysis and Multidimensional Scaling. Correspondence Analysis - Interpretation of the Dimensions of the Social Representational Field. Statistical Structure and Objectification. Part 2: Shared Knowledge and Individual Positions: Three Basic Notions in the Multivariate Approach to Individual Differences. Factor Analysis. Multidimensional Scaling Analysis of Individual Differences. From Consensus to Individual Positioning. Part 3: Group Effects in Individual Positioning: Correspondence Analysis and the Study of Anchoring. Factor Scores. Automatic Interaction Detection. Discriminant Analysis. Correspondence Analysis of Textual Data. Status of Field Variations.