The chief psychologist at a state prison has developed a rehabilitation program for inmates convicted of violent crimes against females
All of the prisoners have been rated on the frequency of their attendance at sessions (the program is voluntary) and have completed a battery of tests which measures their level of hostile and aggressive feelings towards females. Are less hostile attitudes associated with frequent attendance at sessions? Does the program work?
Hostility Towards Women by Frequency of Attendance
FREQUENCY OF ATTENDANCE
HOSTILITY Low High Totals
Low 60 144 204
High 80 31 111
Totals 140 175 315
Calculate percentages and a measure of association for the table. Choose a measure of association appropriate for these variables. Characterize the relationship in terms of the existence, strength, and pattern or direction of the relationship in a paragraph.
To further test the nature of the association between attendance at the program and hostility towards women, the investigator controlled for the age of the inmates. For each partial table below, compute percentages and a measure of association and interpret the pattern of relationships. Write a paragraph analyzing the effect of controlling for age on the bivariate relationship.
Hostility Towards Women by Frequency of Attendance, Controlling for Age
A. Younger Inmates (less than 35)
Hostility Towards Women by Frequency of Attendance
FREQUENCY OF ATTENDANCE
HOSTILITY Low High Totals
Low 17 79 96
High 23 7 30
Totals 40 86 126
B. Older Inmates (35 and older)
Hostility Towards Women by Frequency of Attendance
FREQUENCY OF ATTENDANCE
HOSTILITY Low High Totals
Low 43 65 108
High 57 24 81
Totals 100 89 189
For the bivariate table, gamma = -.72 For younger inmates, gamma = -.88 For older inmates, gamma = -.56
The relationship is interactive. The program has a stronger impact on younger inmates.
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