NYAGUTI, JULIANA ANYANGO2023-12-182023-12-182021-10http://localhost:4000/handle/123456789/78THESISThis research aimed at examining the relationship between family functioning and teenagers' sexual behavioural patterns amongst students in public secondary schools in Kajiado West sub-county, Kajiado County, Kenya. Four specific objectives guided the research: to establish how family cohesion affects teenagers' sexual behaviour in public secondary schools in Kajiado West Sub-county, Kenya, to relate how parent-adolescent communication affects teenagers' sexual behaviour in public secondary schools in Kajiado West Sub-county, Kenya, to relate how family adaptability affects teenagers' sexual behaviour in public secondary schools in Kajiado West Sub-county, Kenya and to identify interventions employed by teenagers on their sexual behaviour in public secondary schools in Kajiado West Sub-county, Kenya. This research was further guided by the Olson Circumflex model and the theory of motivation by Herzberg. The research used a convergent parallel mixed method design with a target population of 6085 students from public secondary schools. A sample size of 375 students was selected to participate in the study based on Yamane's formula. Data were collected from this sample using standardized questionnaires; the Family Assessment Device (FAD) and the Adolescent Clinical Sexual Behaviour Inventory (ACSBI-S). Data were analyzed using descriptive analysis, Analysis of Variance (ANOVA), Independent t-Test and Correlation analysis. The findings indicated a statistically significant positive correlation between family cohesion and teenagers’ sexual behaviour. Family cohesion had a positive correlation with sexual knowledge at r=.200; p-value= .000. Therefore an increase in family cohesion has a corresponding positive influence on student sexual knowledge. Family cohesion, on the other hand, had a positive and significant correlation with sexual interests (r=0.135; p= 0.11). The findings imply that family cohesion could be used in regulating some of the sexual behaviour domains of teenagers.en-USTEENAGERS' SEXUAL BEHAVIOUR--PUBLIC SECONDARY SCHOOLSTEENAGERS' SEXUAL BEHAVIOURThesis