A 37-year-old male is experiencing a gradual onset of cognitive decline dating back 3 years. A 58-year-old female is experiencing a 2-year history of memory and function loss as well as frequent repetitiveness. Both patients were later diagnosed with early-onset Alzheimer's despite having no previous family history or medical issues prior to diagnosis.

Using the concepts of motivational interviewing, cognitive stimulation therapy, & Fogg's behavioral model:

• Explain how they address challenges that often result in failure of patients to achieve sustained behavior change.