We study the consumers' preferences for the various attributes of a product. We consider that the consumers' choices are not guided by observed characteristics of a product, but by the quality perception consumers have on these attributes. Our model integrates this issue by means of latent variables, and is interested in the influence of the information received by the consumer on this perception. It also includes consumers' attitudes by supposing that the weight consumers put on attributes describes their tastes. An econometric application on material choices (wood vs. PVC) in the French window market valid these assumptions.