Running Head: ECOLOGICAL MOMENTARY ASSESSMENT MEASURES 1 Are ecological momentary assessment measures of intervention change worth the trouble? Evaluation in four digital mental health trials Christian A. Webb 1,2 , Lori M. Hilt 3 , Caroline M. Swords 3,5 , Daniel M. Bolt 4 , Hadar Fisher 1,2 , and Simon B. Goldberg 5,6 1 Harvard Medical School, Department of Psychiatry, Boston, MA 2 McLean Hospital, Center for Depression, Anxiety & Stress Research, Belmont, MA 3 Lawrence University, Department of Psychology, Appleton, WI 4 University of Wisconsin, Madison, Department of Educational Psychology, Madison WI 5 Center for Healthy Minds, University of Wisconsin – Madison, Madison, WI 6 Department of Counseling Psychology, University of Wisconsin – Madison, Madison, WI Corresponding author: Christian A. Webb, Ph.D. Harvard Medical School & McLean Hospital 115 Mill Street, Belmont, MA 02478 Email: cwebb@mclean.harvard.edu Draft version 1, 10/17/23. This paper is currently under peer review. Please do not copy or cite without author’s permission.