Table 1.

Activities included in a positive (intervention) and neutral (control) program developed for patients with knee or hip osteoarthritis

Week	Positive Program	Neutral Program
1	Three Good Things: Write down 3 good things that happened each day.	Events that Affect You: Write down 3 things that affected you each day.
2	Expressing Thanks: Write a letter to someone whose actions affected you but you never thanked. Deliver the letter in person, if possible.	Changing your Circumstances: Identify small ways you could change your life circumstances. Write down one change that you will try to make in the next week.
3	Acts of Kindness: Do 5 acts of kindness in a single day. Write down what you did, how it made you feel, and how the recipient responded.	Early Memories: Each day, write down an early memory, how it made you feel, and who you were with.
4	Making Good Moments Last: Spend 2-3  minutes each day focusing on a good moment and making it last. Write down what you focused on, how you made it last, and how it made you feel.	Getting Organized: Create a mental outline of everything you have done in the past 7 days and then make a written list.
5	Increasing Pleasant Activity: Identify activities you enjoy, give you a sense of achievement, or bring you closer to others. Try to do at least 4 each day. Write down the activities you do each day in the next week.	Planning the Future: Spend time each morning planning what you are going to do that day. Write down your plans for each day.
6	Practice Your Favorite(s): Pick one of the first 5 activities that you really liked and do it again.	Practice Your Favorite(s): Pick one of the first 5 activities that you really liked and do it again.