By Clyde Coombs
A few facets of the methatheory of dimension -- the matter of mental dimension -- Definitions and postulates -- Genotypic parameters -- Phenotypic parameters -- the world of joint scales -- The unfolding approach -- a few implications for the legislation of comparative judgment.
"This monograph describes the development of a mental concept which defines the knowledge inside the responses of people to stimuli. This has been entire by means of abstracting convinced homes of habit that are invariant over content material. those were categorized and quantified in a idea of knowledge which, with the quasi-formal foundation hypothesized right here, determines the genotypic inferences that may be made up of appear habit. at the foundation offered right here convinced theoretical thoughts and interpretations are constructed and in addition yes new experimental techniques and experimental kinfolk presented"--Preface. (PsycINFO Database checklist (c) 2015 APA, all rights reserved). Read more...
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Extra info for A theory of psychological scaling
C... From Equations (34) and (42) we have immediately: (53) D.?. = - l ? 2 ( P , . - P . j ) 2 = 0, From Statements 8a and 9a i t follows then that all paired comparisons would be consistent and transitive and hence each individual would yield a simply ordered I scale. From Equations (53) and (54) i t immediately follows that the phenotypic scores of individuals and stimuli would be perfectly reliable. It is not yet evident, however, that they contain any common meaning or quality in the sense of a trait as that concept has been defined by genotypic parameters.
Because measurement problems are classifiable on the basis of relations between Q and C values and because this relation is the most common single source of the variance of the C values of an individual over a group of stimuli, the expression for t j ^ may be simplified by taking into account only this one source of variance. i. f. ij [l-j^;j(Chij,Qhij)l- When an experimenter asks an individual to judge stimuli with respect 33 to an attribute (task B) and the individual does so, the variance of the individual's C values has a contribution due to the fact that Cj^j: is related to Q^jj over h and j .
Statements 8 and 9 pertain to choice behavior, and the substatements are for task A and task B, respectively. Statements 8a and 9a, and, Statements 8b and 9b, respectively, are represented by the behavior of an individual in judging which of two statements of opinion he would prefer to indorse and which of two statements of opinion is more anti-X. Aside from the question of the acceptability of the statements already contained in this theory there may be independent statements which can be added, and this theory is to be regarded as by no means complete.