In 1980, he received his first honorary doctorate (from Columbia University) and was awarded his State doctorate ("doctorat d'État") by submitting to the University of Paris ten of his previously published books in conjunction with a defense of his intellectual project under the title "L'inscription de la philosophie : Recherches sur l'interprétation de l'écriture" ("Inscription in Philosophy: Research on the Interpretation of Writing"). The text of Derrida's defense was based on an abandoned draft thesis he had prepared in 1957 under the direction of Jean Hyppolite at the ENS titled "The Ideality of the Literary Object" ("L'idéalité de l’objet littéraire"); his 1980 dissertation was subsequently published in English translation as "The Time of a Thesis: Punctuations". In 1983 Derrida collaborated with Ken McMullen on the film "Ghost Dance". Derrida appears in the film as himself and also contributed to the script.