ABSTRACT
The CPMT-latera l i ty index was not related to total hand sk i l l (i.e., L + R) , as expected, given its formula.
Relation with neurocognitive variables in total sample. The linear effect o f the CPMT-latera l i ty index in a linear regression analysis on the 13 scores, in a model that included age and sex, was significant for 5 scores and approached significance for one: Visua l Recognition, Embedded Figures, Finger Localizat ion, Reading Nonwords, Phonological Fluency, and Figure Recal l (Table 4). For al l these tasks, performance increased with dextrality (i.e., with relative advantage o f the right hand). A unique repeated measures model, with the cognitive measures performed in the total sample (i.e., excluding reading and phonological fluency) as dependent variables and the CMPT-latera l i ty index as the explanatory variable, showed that the interaction between type o f cognitive task and laterality index was significant, that is, the CMPT-lateral i ty index had different effects according to the specific cognitive task (F= 2.1, df= 9; 217,p = .03).
