. ▁ ▁Dé riv es ▁are ▁necessary , ▁according ▁to ▁Situ ation ist ▁theory , ▁because ▁of ▁the ▁increasing ly ▁predict able ▁and ▁monot on ous ▁experience ▁of ▁every day ▁life ▁in ▁advanced ▁capital ism . ▁Deb ord ▁obser ves ▁in ▁his ▁Introduction ▁to ▁a ▁Crit ique ▁of ▁Urban ▁Geography : ▁ ▁Pra xis ▁Several ▁groups ▁have ▁adopted ▁the ▁concept ▁of ▁the ▁dé rive ▁and ▁applied ▁it ▁in ▁their ▁own ▁form , ▁including ▁many ▁modern ▁organizations , ▁most ▁not ably ▁the ▁Lo iter ers ▁Res istance ▁Mov ement ▁( Man chester ), ▁the ▁London ▁Psych oge ographical ▁Association , ▁Wright s ▁and ▁S ites ▁( not ably ▁the ▁mis gu ided ▁dr ifts ▁of ▁myth oge ograph er ▁Phil ▁Smith ), ▁the ▁Un il alia ▁Group , ▁and ▁the ▁Prov idence ▁In iti ative ▁for ▁Psych oge ographic ▁Studies . ▁Since ▁ 2 0 0 3 ▁in ▁the ▁United ▁States , ▁separate ▁events ▁known ▁as ▁the ▁Prov idence ▁In iti ative ▁for ▁Psych oge ographic ▁Studies ▁and ▁Ps y - Ge o - Con fl ux ▁have ▁been ▁dedicated ▁to ▁action - based ▁particip atory ▁experiments ▁similar ▁to ▁the ▁dé rive ▁within ▁the ▁context ▁of ▁psych oge ography . ▁ ▁Technology ▁A ▁smart phone ▁app ▁named ▁Dé rive ▁was ▁developed ▁in ▁the ▁ 2 1 st ▁century ▁by ▁a ▁team ▁including ▁ ▁Edu ardo ▁C ach uch o ▁and ▁Bab ak ▁F ak ham za de h . ▁The ▁smart phone ▁app ▁shows ▁a ▁series ▁of ▁simple ▁ge ography - based ▁directions ▁such