The present indices of difference in verbal and visual memory trajectories would also be congruent with two other observations previously reported in our kindred sample: the distinct predictive pathways for visual and for verbal memory in an analysis of the generational differences [25], and the absence of correlation between the verbal and visual memory measures in the offspring sample [8].
In [1], Diaz and Osler concluded that the fractional difference by choice is a normal method of letting the index of differences, in the criterion appearance for the nth difference, to be any number (real or complex).
The proposed method uses the Kullback-Leibler divergence (KLD) as the index of difference in distribution between two groups.
Diaz and Osler[2] defined the fractional difference by the rather natural approach of allowing the index of differencing, in the standard expression for the n th difference, to be any real or complex number.
If the ranges of n1 and n2 are 0 ≤ n1 ≤ N − 1 and −M + 1 ≤ n2 ≤ M − 1, the resulting index of difference co-array will achieve full coverage for 0 ≤ k ≤ MN − 1.
Given sample points in the range (−L,L), the largest coprime pair that it could have is M and N subject to MN < L, such that n1 and n2 restricted to the range 0 ≤ n1 ≤ ⌊L/M⌋ and −⌊L/N⌋ ≤ n2 ≤ ⌊L/N⌋, the resulting index of difference co-array k = M n1 − N n2 will achieve full coverage in the range 0 ≤ k ≤ L − 1.
DVAT score provides an index of difference between compatible and incompatible tasks (a value close to zero for subjects indicated no DVAT effects of compatibility).
Section 6 compares our results with official indices of gender differences.
The data support the usefulness of the go/no-go and fast tasks for genetic studies, which require reliable and valid indices of individual differences.
