On the inadequacy of the regression paradigm used in the study of human judgment

Although traditional instruments of research into human judgment - correlational statistics, the lens model, the ANOVA approach, etc. - are analytical, logical, and explicit tools of study, they might be inadequate, irrational and incorrect in their ultimate impact. In this short note a few examples are introduced to show that linear (in parameters) regression models could represent only a quasi-rational paradigm at best. Simple graphical diagrams are used to clarify three main difficulties with the linear model.