▁model ▁is ▁an ▁applied ▁stim ulus - response ▁model . ▁ ▁A ▁number ▁of ▁hier arch ical ▁models ▁can ▁be ▁found ▁in ▁the ▁literature ▁including ▁Lav idge ' s ▁hierarchy ▁of ▁effects , ▁D AG MA R ▁and ▁variants ▁of ▁A ID A . ▁Hier arch ical ▁models ▁have ▁domin ated ▁advert ising ▁theory , ▁and , ▁of ▁these ▁models , ▁the ▁A ID A ▁model ▁is ▁one ▁of ▁the ▁most ▁widely ▁applied . ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ ▁▁▁▁▁▁▁▁▁ ▁As ▁consum ers ▁move ▁through ▁the ▁hierarchy ▁of ▁effects ▁they ▁pass ▁through ▁both ▁a ▁cogn itive ▁processing ▁stage ▁and ▁an ▁affect ive ▁processing ▁stage ▁before ▁any ▁action ▁occurs . ▁Thus ▁the ▁hierarchy ▁of ▁effects ▁models ▁all ▁include ▁C ogn ition ▁( C )- ▁A ffect ▁( A )- ▁Be hav iour ▁( B ) ▁as ▁the ▁core ▁steps ▁in ▁the ▁underlying ▁behavior al ▁sequence . ▁Some ▁texts ▁refer ▁to ▁this ▁sequence ▁as ▁Learning ▁→ ▁Fe eling ▁→ ▁Do ing ▁or ▁C - A - B ▁( c ogn itive ▁- aff ect ive - be havior al ) ▁models . ▁▁ ▁C ogn ition ▁( A war eness / learning ) ▁→ ▁A ffect ▁( Fe eling / ▁interest / ▁desire ) ▁→ ▁Be havior ▁( Action ▁e . g . ▁purchase / ▁trial / ▁consumption / ▁usage / ▁sharing ▁information ) ▁ ▁The ▁basic ▁A ID A ▁model ▁is ▁one ▁of ▁the ▁longest ▁serving ▁hier arch ical ▁models , ▁having ▁been ▁in ▁use ▁for ▁more ▁than ▁a ▁century . ▁Using ▁a