Vers une métrique absolue dans les épreuves d'évaluation subjective

The functional method is a new construction method of subjective evaluation tests such as personality, values or competences. Its approach differs from the usually used methods that are directly inherited from the works of Spearman that are tests of maximal performances. The latter tests were developed (almost one hundred years ago) for selection purposes in a differential perspective that suggests certain “underlying” aptitudes from which the level is simply obtained by a sum of the right answers. Thus, the subjective evaluation tests have no unique underlying aptitude and do not give a sum of correct answers, but it shows a global and multidimensional vision of oneself. The functional method points out this multidimensional specificity and offers a model of the subject's answers that reveals his or her strategy that is projected into a hyper-spherical measurement space defined by the characteristics of the items. This measurement space allows the calculation of scores that are the projections (scalar products) of vectors onto one another. The very interests of this method are a better reliability, a clinical intra-personal evaluation of the subjects (that are much more efficient than the simple differential approach that is also described in the article) and, finally, a more informative control upon the intake conditions (test biases, suitability of the test for a person, etc.).