The Role of Entropy in Construct Specification Equations (CSE) to Improve the Validity of Memory Tests: Extension to Word Lists.

With the same explanatory variables, but with different empirical task difficulties, the values for the two principal groups of the test persons portioned according to cognitive health status are found to result in slightly different CSEs for each group, although these differences are barely significant compared with the measurement uncertainties (the latter, with a coverage factor k = 2, are given in parentheses): (4) z R R A V L T I R H C + S C D = + 4 ( 3 ) + 0.7 ( 6 ) · P r i m a c y i + 0.7 ( 5 ) · R e c e n c y i + 0.2 ( 2 ) · F r e q u e n c y i (5) z R R A V L T I R M C I + A D = + 7 ( 4 ) + 1.0 ( 7 ) · P r i m a c y i + 0.9 ( 7 ) · R e c e n c y i + 0.1 ( 3 ) · F r e q u e n c y i Figure 5 a–c show the relation between the empirical values and CSE/quasi-theoretical (zR) values of the task difficulty for the whole cohort and the two subgroups.

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