Seminal research on leadership trait theory is foundational to modern leadership training and development programs. Demographic changes in the workforce have occurred since the seminal studies were performed. In this quantitative study, archived data from seminal research involving 185 employees of a highway patrol organization in 1960 were compared to survey data gathered from 166 employees of a similar organization in 2010. Data from both groups consisted of responses to the Leader Behavior Description Questionnaire (LBDQ), a survey instrument consisting of 120 Likert-type items and demographic questions designed for use in assessing perceptions of leaders' behaviors. Archived 1960 sample data were compared with data from the full 2010 sample and from the 2010 sample, male-only subset. Independent samples t tests were conducted to determine group mean differences for aspects of leader behavior related to structure and consideration. There were significant differences between the 1960 sample and the full 2010 sample for structure, t(349) = -6.30, p < .001, and for consideration, t(349) = -8.03, p < .001. There were significant differences between the 1960 data and the 2010 male-only sample for structure, t(330) = -6.20, p < .001, and for consideration, t(330) = -7.84, p < .001. Compared to employees in 2010, employees in 1960 perceived leaders as delineating leader roles more strongly and as more concerned with team welfare. The specific time of year during which 1960 data were gathered was unknown; it is not known if results may have been affected by periodic variation. Various components of the leadership environment should be targeted for future research; investigations should include: graduating the LBDQ instrument by including an additional quantitative component focusing on leadership effectiveness thresholds for each of the ten constructs, exploring the relationships between the LBDQ behavioral constructs and perceived leader efficacy using a mixed methods analytic approach, and extending this investigation of leader behaviors through analyses of demographic variables.