▁Dis orders ▁in ▁Dream s ). ▁As ▁the ▁title ▁suggests , ▁Kra ep elin ' s ▁declared ▁aim ▁was ▁to ▁analyze ▁only ▁devi ant ▁spec im ens ▁of ▁speech ▁from ▁dream s . ▁Spec im ens ▁reflect ing ▁correct ▁speech ▁processes ▁were ▁ex cluded ▁from ▁his ▁study . ▁To ▁this ▁end , ▁Kra ep elin ▁assemble d ▁in ▁the ▁course ▁of ▁twenty ▁years ▁ 2 8 6 ▁spec im ens , ▁the ▁vast ▁majority ▁drawn ▁from ▁his ▁own ▁dream s , ▁with ▁no ▁pre ten se ▁to ▁non select ivity . ▁He ▁apparently ▁drew ▁in ▁large ▁measure ▁from ▁hyp n agog ic ▁and ▁occasionally ▁hyp n op om pic ▁dream lets ▁( ex per ien ced ▁when ▁falling ▁as leep ▁and ▁w aking ▁up ), ▁which ▁differ ▁phen om olog ically ▁from ▁full - f led ged ▁dream s ▁and ▁are ▁character ized ▁by ▁different ▁ne uro log ical ▁indices ▁as ▁well . ▁ ▁Kra ep elin ▁met icul ously ▁class ified ▁his ▁collection ▁of ▁dream s ▁according ▁to ▁the ▁nature ▁of ▁the ▁dev ian ces ▁from ▁correct ▁normal ▁speech ▁in ▁w ake ful ness . ▁Three - fif th s ▁of ▁his ▁spec im ens ▁were ▁grouped ▁as ▁dis orders ▁of ▁word ▁selection , ▁including ▁large ▁numbers ▁of ▁ne olog isms ▁( non - ex isting ▁words , ▁typically ▁formed ▁by ▁combinations ▁of ▁existing ▁words ▁or ▁their ▁components ); ▁just ▁over ▁one - fif th ▁as ▁dis orders ▁of ▁disc ourse ▁( act ap has ia , ▁usually ▁involving ▁the ▁incorrect ▁choice