ˈʌðɚ stˈʌdiz kəmpˈɛɹɪŋ ðə dˈɛbɪɾɪdʒ ʌv baɪfˈeɪʃəl ɹᵻdˈʌkʃən dˈʊɹɹɪŋ dˈɪfɹənt stˈeɪdʒᵻz həznɑːt jˈiːldᵻd sˈʌtʃ pˈɑːzᵻtˌɪv ɹɪzˈʌlts.
Other studies comparing the debitage of bifacial reduction during different stages has not yielded such positive results.