 with brain pathology. We realize that there are severe difficulties, both in establishing comparability of lesions across these age groups, and in achieving any certainty of the comparability of tasks; and it will not be possible to do equal justice to all the questions in the next few years, since so much depends on the rates at
with brain pathology. We realize that there are severe difficulty, both in prove comparability of lesions across these age group, and in achieving any certainty of the comparability of job; and it will not be potential to do equal justice to all the questions in the next few year, since so much depends on the rate at
 wihh brain pathology. We rexlize that therg qre setere dirficultids, both in establishing comperabulity of lesions across there age grlups, and in echieving any cecfainty of the gompaxauility of tasks; and it winl not be posshbue to do equal justice to all the queftions on the next few iears, fincs so much depends on the rates at
with brain pathology. We realize that there difficulties, in establishing of lesions across achieving certainty of the of tasks; and will not be possible to do justice to all the questions in the next few years, since so much on the rates at
 with brain pathology. We realiZe that therE are sEveRe dIfFicuLtieS, both in establiSHing Comparability of lesions AcrosS tHEse aGE gRoups, And in acHIeVINg aNy CeRtaInTY oF the cOmpArabiliTy of tasks; aNd iT wIll not be possIBlE to do equal JusTice to all the QueStions In The NExt feW yeArs, siNce so mUCh depeNds on the rAtES at
 with brain pathology. Werealize th at th ere  ar eseve re d ifficulties, b o th i n establishing compara bilit yo f le s io ns ac ross th e se a gegr ou ps,  a n din ac hie ving an y certaint y o fthe comparab i li ty of task s;and it willnot  be po ss ibl e  to d o e qualjustic e  to al l the que st i ons in the nex t fe w ye ars, since so muc h  d e pends on the r ates a t
 with_brain pathology._We realize that there_are severe_difficulties,_both in_establishing_comparability of lesions_across these age_groups, and in achieving_any certainty of_the_comparability of tasks; and it will not be possible to do equal justice to_all_the questions_in_the_next few years, since so_much depends on the rates_at