11. The method of claim 10 wherein the comparing of (e) includes the plurality of feature vectors compared to the known phone-based features for children to return a plurality of results, wherein there is a result of the plurality of results for each of the plurality of feature vectors; and the plurality of results are averaged for use in the determining of (f).
10. The method of claim 1 wherein the phone-based features are represented by a plurality of feature vectors.