This study were to examine what autogenesis clusters are formed according to combinations of adolescents'' basic psychological needs, psychological reactance and loneliness, based on the self-determination theory, and investigate what differences occur in the intention of school dropout among such clusters. To this end, questionnaires about them were administered to 349 adolescents (220 males and 129 females) who were currently enrolled in middle and high schools located at Gyeongsang-do.
The findings were as follows: First, a difference by gender was found in the intention of school dropout, the degree of which seemed to be higher in female than in male. Thus, it could be found that behaviors to satisfy needs that could not be met in homes or schools, through experiences outside the schools were shown more often by male students, than by female students.
Second, the cluster analysis showed that three kinds of autogenesis clusters were formed according to combinations of satisfactions of needs for autonomy, competence and relationship, psychological reactance and loneliness. The cluster 1 with the number of students was called a ''satisfaction stable need'' group; the cluster 2 with the second-highest number of them, an ''insufficient adaptive need'' group; and the cluster 3 with the lowest number of them, a ''reactive to frustrated need'' group.
Third, an examination of differences by gender, school year, grade and department among three clusters, in order to verify demographic characteristics by each one showed that there are significant differences by them, except for the gender. In particular, it should be noted that a considerable number of the second graders in high schools were frustrated with needs for autonomy and very often experience reactance for recovering from risks of autonomy, frustration with needs for relationship, and therefore, loneliness as a subjective pain.
Fourth, the discriminant analysis was conducted to verify whether psychological reactance, loneliness and sub-levels of the basic psychological needs could properly discriminate sub-clusters, with independent variables as three factors and a dependent one as the cluster. The findings exhibited that the groups were most significantly discriminated by psychological reactance, followed by satisfaction of need for competence, then loneliness, satisfaction of need for relationship and autonomy.
Fifth, an analysis of differences in the intention of school dropout by type of cluster showed that the degree of intention of school dropout is highest in the cluster 3, the ''reactive to frustrated need'' group, followed by the cluster 2, the ''insufficient adaptive need'', and then the ''satisfaction stable need''.
The results of this study had an implication in providing empirical basic data for understanding adolescents with the intention of school dropout from a new perspective, by examining some discriminating characteristics of the differences of basic psychological need, psychological reactance and loneliness affecting the intention.