Appendix 2.

Sample essays about positive memories

Phase	Instructions
Participant A: BD participant with a history of psychosis	I though of my pet Colic and the years of love, devotion, companionship, and being a best friend I got from having him. We were inseparable for years. He was the best pet I ever had and a better companion than some people I knew. He was very intelligent and very protective of me, and loved him so much I could never replace him.
Participant B: BD participant without a history of psychosis	How, as a child, I loved staying at our grandparents' farm. I felt much love and good there, I loved being outside with the sheep, pigs and cows. I loved walking to the woods. I loved the outside sights and smells and the chatter of the birds. I loved most in the world my grandma and grandpa who loved me for me and loved me unconditionally. I loved how grandma was patient with craft projects or teaching me to crochet. I loved grandma's cooking.
Participant C: Healthy control participant	My thoughts returned to how nice it was to feel loved and accepted by someone I loved. I felt very happy to think that someone who I enjoyed so much would want to spend the rest of his life with me. I felt also confident that I could sustain the relationship because of all the weird interests we shared, and was largely unconcerned that I would get bored over the long term.