Master's Thesis from the year 2016 in the subject Psychology - Social Psychology, grade: A, , course: counseling psychology, language: English, abstract: Risky sexual behaviour is a common habit among young people in the world, and its relation with personality has not been explored exhaustively, especially in Kenya. The purpose of the study was to establish the relationship between personality sub-types and involvement in risky sexual behaviour among secondary school students in Nyakach Sub-county, Kisumu County, Kenya. The study was guided by the following research objectives; to establish the relationship between introversive personality subtype and involvement in risky sexual behaviour; to find out the relationship between extroversive personality subtype and involvement in risky sexual behaviour; to determine the relationship between the neurotic personality subtype and involvement in risky sexual behaviour and to investigate the relationship between the Psychoticism and involvement in risky sexual behavior. The study was informed by two theories that is, the Eysenck’s Theory of personality and the Theory of Planned Behavior. The research design used in this study was the Correlational research design. The sample size of this study was 46 schools representing 88% of the target population. As for the students, 390 students were sampled from total target population 15,678. This study used multistage random sampling to select the schools and students. Quantitative data was collected using Eysenck’s Personality Questionnaire (EPQ) and Risky Sexual Behaviour Questionnaires. Quantitative data was analyzed using descriptive statistics (frequency, percentages and mean) as well as inferential statistics (Pearson Correlation and multiple regressions). The major findings of the study showed relationship between personality sub-types and involvement in risky sexual behaviour (for introversion r=-0.439, extroversion r=0.786, neuroticism r=-0.410 and Psychoticism r=0.025). Multiple regression at R2=0.679 showing that personality subtypes are significant predicators of involvement in risky sexual behaviour at 67.9%. Reliability of questionnaires was obtained through internal consistency with cronbach’s constant at 0.632.The study recommended that the Ministry of Education should develop working guidelines to educate and mould the students in a way that they reduce their risk of engaging in risky sexual behaviour. [...]