The Carey Guides is a primary educational program deliberately chosen and approved by the Department of Corrections in Wisconsin, in which all inmates are encouraged (not required) to complete as they work toward custody reduction. Some aspects emphasized in it include anti-social thinking, emotional regulation, moral reasoning, and so on. It is the basis for the control group therapy as a way to ensure that the treatment has a uniform process as it is taught in the Department of Corrections (DOC) prison system.

Enright Forgiveness Inventory Short Form (30 items) was used as a measurement of forgiveness. It includes three subscales: affect, behavior, and cognition, with 10 items in each subscale. The introductory material at the beginning asks participants to focus on the worst injustice they experienced before their first imprisonment, and to indicate the person who unfairly treated them, time to event, degree of hurt and a brief description of the experience. Then participants were asked to think about the person who hurt them and rate the 30 items on a 6-point Likert scale ranging from "strongly disagree" to "strongly agree." Half of the items are negative statements, and reverse coding is done in the data analysis. An example of the positive items is "I feel warm toward him/her," and a negative one is "Regarding this person, I disapprove of him/her." The total forgiveness scores range from 30 to 180, with each subscale scores in the range of 10 to 60. A higher score means more forgiving.

The Coopersmith Self-Esteem Inventory Form B (Adult Version), consisting of 25 true-false statements evaluating attitudes toward the self in the following domains: general self, social self, self and peers, self and parents, such as "I can make up my mind without too much trouble"; "I have a low opinion of myself". Whereas the original inventory was developed for use with children, Form B has been successfully modified and applied for adults both in college and industry. A participant gets 1 point for each "True" response and 0 point for each "False" response to 8 positive self-esteem statements, and the reverse points to 17 negative statements. Scores range from 0 to 25. A higher score means a higher self-esteem a participant has.

The Toronto Empathy Questionnaire (TEQ) developed in partnership with the University of Toronto contains 16 items that cover both positive and absent responses of emotional empathy, such as "It upsets me to see someone being treated disrespectfully." "I enjoy making other people feel better." Participants responded on a 5-point scale ranging from "never" to "always." Half of the items need to be reversely coded, and the total empathy score ranges from 16 to 90. A higher score means a higher level of empathy.

The Marlowe-Crowne Social Desirability Scale (20-item short version) was used here to measure if a participant is "faking good" to meet the social desirability in psychological tests. It also assesses the degree to which each participant is taking this set of questionnaires seriously or not. This 20-item short version of the Marlowe-Crowne Social Desirability Scale was developed by Strahan and Gerbasi, with 20 statements using a true/false response format. An example is "I never hesitate to go out of my way to help someone in trouble." A participant gets 1 point for each "True" response and 0 point for each "False" response to 10 socially desired statements, and the reverse points to 10 not socially desired statements. Scores range from 0 to 20. A higher score represents a higher tendency of "faking good" in the test.

The MACE scale includes 52 items and measures retrospectively ten types of maltreatment during each year of childhood from 1 to 18 years old. The ten subscales or types of maltreatment measured include: emotional neglect, non-verbal emotional abuse, parental physical maltreatment, parental verbal abuse, peer emotional abuse, peer physical bullying, physical neglect, sexual abuse, witnessing interparental violence, and witnessing violence to siblings.