abling ▁him ▁or ▁her ▁to ▁generate ▁all ▁the ▁infinite ▁number ▁of ▁well - formed ▁sentences ▁in ▁the ▁native ▁language ▁while ▁generating ▁none ▁of ▁the ▁ill - formed ▁sentences . ▁That ▁in ▁actual ▁use , ▁i . e ., ▁lingu istic ▁performance , ▁the ▁speaker ▁is ▁limited ▁in , ▁among ▁other ▁things , ▁the ▁complexity ▁or ▁elabor ation ▁of ▁the ▁sentences ▁he ▁or ▁she ▁can ▁generate , ▁and ▁often ▁produces ▁utter ances ▁which ▁are ▁ill - formed , ▁is ▁due ▁to ▁the ▁limitations ▁of ▁the ▁various ▁auxili ary ▁psych ological ▁mechan isms ▁at ▁the ▁speaker ' s ▁dispos al , ▁such ▁as ▁limited ▁short - term ▁memory , ▁per cept ual ▁limitations , ▁and ▁defect ive ▁feedback , ▁as ▁well ▁as ▁to ▁factors ▁such ▁as ▁deliber ate ▁changes ▁in ▁structure ▁in ▁mid - sent ence , ▁and ▁un cons cious ▁inter ference ▁of ▁the ▁Fre ud ian ▁type . ▁ ▁All ▁the ▁above ▁has ▁tradition ally ▁applied ▁to ▁the ▁native ▁speaker ▁in ▁the ▁w aking ▁state . ▁The ▁experiment ▁expl ored ▁the ▁lingu istic ▁performance ▁of ▁the ▁native ▁speaker ▁in ▁the ▁dream ing ▁state . ▁▁ 7 8 ▁Dutch ▁subjects ▁sleep ing ▁at ▁home ▁recorded ▁on ▁special ▁forms ▁following ▁precise ▁protocol ▁instructions ▁a ▁total ▁of ▁ 5 6 6 ▁Dutch ▁utter ances ▁directly ▁re called ▁and ▁trans cribed ▁from ▁ 5 6 6 ▁dream s ▁which ▁had ▁been ▁in ▁progress ▁prior ▁to ▁alarm ▁clock ▁aw ak ening ▁in ▁the ▁morning . ▁( For ▁just ▁over ▁ 8 0 ▁percent ▁of ▁all ▁aw aken ings