the measurement of holland types in a 10‐year longitudinal study of a sample of students

The author examined the incidence and stability of Holland types in a longitudinal study of a sample of students. Of the 208 students who began the study, 65 provided occupational aspirations at all 6 interview points. Social, Investigative, and Enterprising were the top Holland codes in 2nd and 12th grades. Eighteen percent of the students had the same primary code 5 or 6 times during the time span. More than 60% of the sample had at least 1 set of opposite Holland types over the 6 measurement times.