) ▁and ▁Cry st all ized ▁Int elligence ▁( G c ). ▁Where as ▁G f ▁is ▁bi olog ically ▁and ▁constitution ally ▁based , ▁G c ▁is ▁the ▁actual ▁level ▁of ▁a ▁person ' s ▁cogn itive ▁function ing , ▁based ▁on ▁the ▁augment ation ▁of ▁G f ▁through ▁soci oc ult ural ▁and ▁exper ient ial ▁learning ▁( including ▁formal ▁school ing ). ▁ ▁The ▁most ▁widely ▁used ▁individual ▁tests ▁of ▁cogn itive ▁ab ilities , ▁such ▁as ▁the ▁current ▁ed itions ▁of ▁the ▁We chs ler ▁Ad ult ▁Int elligence ▁Sc ale ▁and ▁the ▁Stan ford – B inet ▁Int elligence ▁Sc ale , ▁report ▁cogn itive ▁ability ▁scores ▁as ▁" de viation ▁I Q s " ▁with ▁ 1 5 ▁and ▁ 1 6 ▁I Q ▁points ▁respectively , ▁corresponding ▁to ▁one ▁standard ▁deviation ▁above ▁or ▁below ▁the ▁mean , ▁C att ell ▁built ▁into ▁the ▁CF IT ▁a ▁standard ▁deviation ▁of ▁ 1 6 ▁I Q ▁points . ▁ ▁Cultural ▁and ▁age ▁differences ▁▁ ▁Cry st all ized ▁intelligence ▁( G c ) ▁refers ▁to ▁that ▁aspect ▁of ▁cogn ition ▁in ▁which ▁initial ▁intellig ent ▁jud g ments ▁have ▁become ▁cry st all ized ▁as ▁hab its . ▁Fl uid ▁intelligence ▁( G f ) ▁is ▁in ▁several ▁ways ▁more ▁fundamental ▁and ▁is ▁particularly ▁evident ▁in ▁tests ▁requiring ▁responses ▁to ▁novel ▁situations . ▁Before ▁bi ological ▁m atur ity ▁individual ▁differences ▁between ▁G f ▁and ▁G c ▁will ▁be ▁mainly ▁a ▁function ▁of ▁differences ▁in ▁cultural ▁opportunity ▁and