L C Jensen’s research while affiliated with Brigham Young University and other places

Differences in school behavior and achievement between students from intact, reconstituted, and single-parent families were analyzed. Students from intact two-parent families had fewer absences and tardies, higher grade point averages, and fewer negative and more positive teacher behavioral ratings than did those from reconstituted and single-parent families.

The effects of three abstinence sex education programs on student attitudes toward sexual activity were studied. The programs were administered to 7th- and 10th-grade students in three school districts in the State of Utah. All students were administered a pre- and posttest survey to determine attitude change. The independent variables were program, grade level, gender, and pre/posttest. The dependent variable was the combined and averaged response to 12 questions taken from the survey. There was a four-way interaction between the independent variables. The Sex Respect program produced the most positive attitude change.

The effects of two family structures, single- and two-parent homes, on adolescent sexual behavior were studied. The variables of race, age, and gender were controlled. The analysis compared the age at first intercourse, frequency of intercourse in the last four weeks, and virgin/nonvirgin status of adolescents from black single-parent families, white single-parent families, black two-parent families, and white two-parent families. For males, the two-parent family was related to less sexual activity and older age at first intercourse. For females, the two-parent family was not as important as race in influencing sexual behavior. The white females from two-parent families were more likely to be virgins, but once having had sexual intercourse, tended to have a higher level of sexual activity than did black females from two-parent homes.

The relationship between early sexual maturation and the psychosexual behaviors of dating and sexual intercourse was investigated using a national sample of adolescent females aged 15 to 19. Among both black and nonblack subjects, early-maturing girls were more likely to have experienced earlier dating and coital onset than were their later-maturing peers. Blacks experienced menarche and first intercourse at earlier ages, yet dating onset at later ages. Early menarche was also associated with marriage at an early age for nonblacks, but not for blacks. These racial differences were explained in terms of diverse socialization patterns or cultural expectations. For both blacks and nonblacks, those with earlier coital experience were found to have had menarche and dating onset at earlier ages.