Case: A 10-year-old boy named Michael is struggling to cope with the recent death of his father. He is having difficulty sleeping, concentrating in school, and getting along with his friends.

Presenting problem: Michael is experiencing grief and loss due to the death of his father.

Intervention: A therapist would work with Michael to develop coping mechanisms for dealing with his grief and loss. This may include teaching him relaxation techniques, helping him to express his feelings in a healthy way, and providing him with support from other children who have experienced similar losses.

Instrument: The Connor-Davidson Resilience Scale (CD-RISC) is a 25-item self-report questionnaire that measures an individual’s level of resilience. It is a reliable and valid instrument that has been used in a variety of research studies.

Why: The CD-RISC is appropriate for use in a single-subject design because it is a brief and easy-to-administer instrument. It is also sensitive to change, which means that it can be used to track Michael’s progress over time.

To evaluate the effectiveness of the intervention in increasing Michael’s level of resiliency, the therapist would administer the CD-RISC to Michael at the beginning and end of the intervention. If the intervention is effective, Michael’s score on the CD-RISC should increase at the end of the intervention.

It is important to note that resiliency theory is not a one-size-fits-all approach. The specific intervention that is implemented will vary depending on the individual’s needs and circumstances. However, resiliency theory can provide a framework for therapists and other professionals to help people develop the skills and resources they need to cope with adversity and bounce back from difficult experiences.