applicability of the conception. Next, the students spent four weeks in small groups where each student presented their conception to the group and received criticism, after which they turned in a defense of their existing conception, or a modified conception. This step demonstrated the reaction of students to peer criticism. Finally, after another four weeks of small group study of existing conceptions of mature personality in academic psychological literature, the students once again turned in a defense or modification of their conception. This step demonstrated the reaction of students to being confronted by authority. Graves observed the students in their small group work, without their knowledge as logistics allowed, and interviewed each student after the final defense or revision was turned in. Phase two: Classification of the essays Each year, Graves recruited seven to nine new judges who knew nothing of the project, and instructed them as follows: Take these conceptions of mature personality, study them, then sort them into the fewest possible categories if you find them to be classifiable. Do not force any into categories. If some do not fit any category you decide upon, just place them into an unclassifiable group. Each judge first produced their own classification, and then the judges produced a single classification by unanimous agreement. Essays for which no unanimous classification could be determined were added to the unclassifiable group. Phase three: Observation of behaviors of groups of people with similar conceptions Graves also taught classes in Organizational/Industrial, Experimental, and Abnormal Psychology, and most of his students from the Phase One studies took one of those classes from him the semester after taking Normal Psychology. These classes were structured such that students were organized into groups which, unknown to them, each contained students with the same classification of mature personality. Students who had not participated in Phase One were grouped together, providing what Graves called a "moderate control" effect. Students in the Organizational and Experimental Psychology classes were given specially designed problems to solve, while those in the Abnormal Psychology class were given many standard psychological tests as part of that class's normal approach. Graves studied the groups through one-way mirrors, gathering data on how they organized themselves, interacted with each other, solved problems, and performed on standard tests. Phase four: Making sense of the data through research From 1960 until his retirement in the late 1970s, Graves researched other work in order