ABSTRACT
One of the theses argued in this book is that the theory of conjoint measurement opens the way to measurement in psychology, providing, of course, that psychology actually deals with quantitative variables. In the preceding chapters three theories of psychological measurement have been considered, and it was shown how they each entail the existence of structures of the kind treated by the theory of conjoint measurement. That is nothing but the first step down a long and difficult road. In this chapter let us consider some later steps in a general and schematic way.
