Behavioural Skills Training and Protected Sex

Keywords: One-way repeated measures with one between-subjects factor.

Description

The data give the results of an study aimed at reducing the risk of HIV infection among African-American adolescents. The subjects were 14-18 year old female and male adolescents in a Southern USA city. The study compared two interventions. The treatment intervention was an 8-week Behavioural Skills Training (BST) program. The control was an single 2-hour education session about HIV and AIDS. The subjects completed sexual attitude and activity questionnaires before and after the intervention and at 6-month and 12-month follow-ups. The data here are for 10 subjects for each intervention although the original study was much larger. The data given here appear to have been created by Howell (1999) based on summary statistics from the original study. The dependent variable is the logarithm-transformed frequency of condom-protected sex ( log(Y+1) ).


	Variable		Description

	BST		1 = BST intervention, 0 = control
	Pre		Log-frequency of protected sex before the intervention
	Post		Log-frequency of protected sex after the intervention
	FU6		Log-frequency of protected sex reported at the 6 months follow-up
	FU6		Log-frequency of protected sex reported at the 12 months follow-up

Download

Data File (tab-delimited text)

Source

St Lawrence, J. S., Brasfield, T. L., Shirley, A., Jefferson, K. W., Alleyne, E., and O'Brannon, R. E. III (1995). Cognitive-behavioral intervention to reduce African American adolescents' risk for HIV infection. Journal of Consulting and Clinical Psychology, 63, 221-237.

Howell, D. C. (1999). Fundamental Statistics for the Behavioral Sciences, 4th Edition. Duxbury Press, Pacific Grove, California. Exercises 18.9 and 18.11.

Analysis

There is an interaction between intervention and time of measurement.