(Left to right) Vickie Naylor, Bernadine Clay, and Donna Maxey look over the walking route as they take part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

Participants look over the walking route as they take part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

(Left to right) Vickie Naylor, Bernadine Clay, and Donna Maxey read a memory prompt as they take part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

(Left to right) Vickie Naylor, Bernadine Clay, and Donna Maxey share childhood experiences as they take part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

(Left to right) Bernadine Clay, Donna Maxey and Vickie Naylor take part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

Raina Croff, Ph.D., assistant professor of neurology at OHSU. (OHSU)

Donna Maxey reads a memory prompt as she takes part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

A sample of the memory prompts used in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

(Left to right) Bernadine Clay, Vickie Naylor and Donna Maxey read a memory prompt as they take part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)

Bernadine Clay takes part in the Sharing History through Active Reminiscence and Photo-Imagery (SHARP) study, September 20, 2017. (OHSU/Kristyna Wentz-Graff)