By Clyde Coombs
A few features of the methatheory of size -- the matter of mental dimension -- Definitions and postulates -- Genotypic parameters -- Phenotypic parameters -- the realm of joint scales -- The unfolding process -- a few implications for the legislation of comparative judgment.
"This monograph describes the development of a mental idea which defines the knowledge inside the responses of people to stimuli. This has been entire by way of abstracting sure homes of habit that are invariant over content material. those were categorized and quantified in a concept of knowledge which, with the quasi-formal foundation hypothesized the following, determines the genotypic inferences that may be made of take place habit. at the foundation provided the following convinced theoretical ideas and interpretations are built and in addition definite new experimental strategies and experimental family presented"--Preface. (PsycINFO Database list (c) 2015 APA, all rights reserved). Read more...
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Additional info for A theory of psychological scaling
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.
P •• P . -j 2 interpretation w i l l be discussed. D_j_ has been discussed in detail elsewhere^ and that discussion will only be summarized here. In sum2 . . mary, D j _ represents the variance of the status score of ara individual on a test, the precision of the score, which can be identified with a measure or index of reliability. It must be recognized that this is reliability from the point of view of that particular set of items comprising that test, a hypothetically experimentally independent test-retest reliability for a single individual.
To pursue the interpretation a little further, the degree of scalability is an indication of the uniformity and homogeneity of those forces (biological and/or environmental) impinging on the individuals relevant to the creation of this attribute. ^' ^ Thus, the characteristics of a society or culture are reflected in the trait organization and structure of its members. Social forces are visible only through their effects on the individual. A very fundamental point must now be discussed. Granting the basis for the definition of an attribute quoted from Bergmann and Spence above, the question arises whether the term consistency should be applied to the behavior of an individual on the - phenotypic, manifest, continuum or to the behavior of an individual on the underlying genotypic .