The factor structure of Holland's hexagonal model as shown in the Self-Directed Search (SDS) has received extensive attention across the world. The goal in creating the SDS was to equip guidance counselors and services with information about adults' personality types, interests, preferences, and career options. More precisely, the SDS items assess…

Using data provided by the Self-Directed Search (SDS) on a sample of 1,519 participants comprising 3 subsamples containing high school students, university students, and working adults, the authors examine the structure of vocational interests in Romania. Three competing structural models of vocational interests (Holland's circumplex model and…

Using Item Response Theory (IRT) and Confirmatory Factor Analysis (CFA), the goal of this study was to select a reduced pool of items from the French Canadian version of the Self-Directed Search--Activities Section (Holland, Fritzsche, & Powell, 1994). Two studies were conducted. Results of Study 1, involving 727 French Canadian students,…

The purposes of this study were to: (1) examine the psychometric properties of the Ball Aptitude Battery (BAB) on a high school freshman sample; (2) develop BAB norms for high school freshmen; (3) develop and evaluate four memory tests and a vocabulary test appropriate for freshmen; (4) examine level and structure differences for the BAB tests…