2. The method of claim 1 , wherein recording each cognitive motivation orientation confidence weight associated with the particular predetermined indicator n-gram matching that particular first text sequence n-gram comprises: maintaining a plurality of first text sequence cognitive motivation orientation weight scores, there being one first text sequence cognitive motivation orientation weight score corresponding to each cognitive motivation orientation in one-to-one correspondence; and for each cognitive motivation orientation confidence weight associated with the particular predetermined indicator n-gram matching that particular first text sequence n-gram, incrementing the first text sequence cognitive motivation orientation weight score corresponding to the same cognitive motivation orientation to which that cognitive motivation orientation confidence weight corresponds, the incrementing being according to that cognitive motivation orientation confidence weight.
2. The method of claim 1 , wherein recording each cognitive motivation orientation confidence weight associated with the particular predetermined indicator n-gram matching that particular first text sequence n-gram comprises: maintaining a plurality of first text sequence cognitive motivation orientation weight scores, there being one first text sequence cognitive motivation orientation weight score corresponding to each cognitive motivation orientation in one-to-one correspondence; and for each cognitive motivation orientation confidence weight associated with the particular predetermined indicator n-gram matching that particular first text sequence n-gram, incrementing the first text sequence cognitive motivation orientation weight score corresponding to the same cognitive motivation orientation to which that cognitive motivation orientation confidence weight corresponds, the incrementing being according to that cognitive motivation orientation confidence weight. 3. The method of claim 2 , wherein using the at least one cognitive motivation orientation confidence weight recorded for the first text sequence to determine a first dominant cognitive motivation orientation set expressed in the first text sequence further comprises normalizing the first text sequence cognitive motivation orientation weight scores to obtain normalized first text sequence cognitive motivation orientation weight scores, there being one-to-one correspondence between the normalized first text sequence cognitive motivation orientation weight scores and the first text sequence cognitive motivation orientation weight scores.