Previous research dealing with educational and vocational choices of college students has resulted in contradictory theories about why some students remain undecided. To determine if self-reported personality characteristics, when studied in conjunction with tested characteristics, increased the ability to discriminate between academic populations, 50 university sophomores who had declared a major were compared with 50 undecided sophomores. The declared sophomore was identified as more venturesome, conservative, self-assured and intelligent; their self-ratings indicated more sober, self-sufficient, intelligent, venturesome and practical tendencies. Undeclared students appeared to be more timid, experimenting, and less intelligent; their self-ratings yielded responses of being happy-go-lucky, less intelligent, timid, imaginative, and tense. The findings suggest that the general theme of the student profiles indicates that undeclared students have less positive feelings about themselves. (Author/JAC)