nˈɛfɪlkˌæmp ænd slˈɛpɪtsə nˈaɪntiːnhˈʌndɹɪd sˈɛvənti ˈeɪt sˈɔː ðə pˈɛɹi skˈiːm æz ɐ dʒˈɛnɚɹəl pɹˈɑːsɛs mˈɑːdəl pɹəvˈaɪdɪŋ ɐ dᵻskɹˈɪptɪv fɹˈeɪmwɜːk fɔːɹ vjˈuːɪŋ ðə dɪvˈɛləpmənt əvən ˌɪndᵻvˈɪdʒuːəlz ɹˈiːzənɪŋ ɐbˌaʊt mˈɛni ˈæspɛkts ʌvðə wˈɜːld.
Knefelkamp and Slepitza (1978) saw the Perry Scheme as a general process model providing a descriptive framework for viewing the development of an individual's reasoning about many aspects of the world.