ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti tˈuː, hiː pɹɪzˈɛntᵻd ɐn ˈoʊvɚvjˌuː ʌvðə fˈiːld ʌv saɪkˈɑːlədʒi ɪnðə kənsˈɛptʃuːəl fɹˈeɪmwɜːk ʌv saɪkˈɑːlədʒi.
In 1952, he presented an overview of the field of psychology in The Conceptual Framework of Psychology.