Final answer:
The best evaluation method for the intervention of repositioning the immobile client with a pressure ulcer every 2 hours would be a decrease in size of the pressure ulcer over a 1-week period.
Step-by-step explanation:
The best evaluation method for the intervention of repositioning the immobile client with a pressure ulcer every 2 hours would be option 3: The client's pressure ulcer shows a decrease in size over a 1-week period.
This evaluation method is effective because it directly measures the effectiveness of the intervention in terms of the pressure ulcer's size. If the pressure ulcer decreases in size over the course of a week, it indicates that the repositioning intervention is helping to heal the ulcer.
Option 1 does not provide specific information about the pressure ulcer itself, option 2 focuses on pain instead of the actual ulcer, and option 4 is more related to the implementation of the turning schedule, rather than the evaluation of the intervention's effectiveness.