According to the same source, prefrontal lobotomy reduces:
ʌ k ɔ ɹ d ɪ ŋ WORD_BOUNDARY t ə WORD_BOUNDARY ð ə WORD_BOUNDARY s eɪ m WORD_BOUNDARY s ɔ ɹ s WORD_BOUNDARY p ɹ ɪ f ɹ ʌ n t ə l WORD_BOUNDARY l ə b ɑ t ə m i WORD_BOUNDARY ɹ ɪ d uː s ɪ z WORD_BOUNDARY