This longitudinal study tested students in Grade 8 and again in Grade 10 on career (maturity, barriers, indecision, decision-making self-efficacy), well-being (self-esteem, life satisfaction, coping) and social (school achievement, paid work experience) variables. Students were allocated to decided or undecided conditions at T1, T2 and across T1-T2, based on self-reported global decidedness ratings. As predicted, the undecided students had poorer career, well-being and social outcomes than the decided students at T1 and T2. The undecided group was also less likely to report having paid work-experience at T1, and to be overrepresented by females at T2. Students who were undecided at T1 and T2 (i.e., continuously undecided) fared poorer than students who were decided at T1 and T2 (continuously decided) and students who changed decision status from T1 to T2 (i.e., developmentally undecided). Females were more likely to be continuously undecided, although continuously undecided males were more complacent and more likely to use maladaptive strategies than females. Implications of being temperamentally versus developmentally undecided are discussed.The present study adds to the literature by seeking to clarify whether adolescents who report persistent career indecision is associated with more negative intra-individual effects, compared to adolescents who report being decided across time or who report a decision status that reflects a developmental indecision. Chronic indecision has been linked with negative intra-individual variables in a variety of studies (e.g., Kelly & Lee, 2002), although these studies have typically examined the characteristics of different types of career decision makers using cross-sectional designs. A relatively severe type of indecision, in comparison to the other groups identified, has invariably emerged from this body of evidence, although the majority of these studies to date have used young adult student samples. The present study seeks to report on important career-related and intra-individual variables associated with groups of school aged decision makers formed on the basis of measures of career indecision taken across time. We present a brief review of the career indecision typology research to provide the context for the design and predictions of the present study.It does appear that there are different types of career indecision and that those who suffer from chronic indecision may be worse off than others. Larson, Heppner, Ham and Dugan (1988), for instance, found a more negative pattern of career planning deficits and more deleterious problem