==== Front Innov Aging Innov Aging innovateage Innovation in Aging 2399-5300 Oxford University Press US 10.1093/geroni/igaa057.1916 igaa057.1916 Abstracts Session 5515 (Symposium) AcademicSubjects/SOC02600 Understanding Cognitive Complaints Among Breast Cancer Survivors Small Brent 1 Jim Heather 2 Eisel Sarah 2 Scott Stacey 3 1 University of South Florida, Tampa, Florida, United States 2 Moffitt Cancer Center, Tampa, Florida, United States 3 Stony Brook University, Stony Brook, New York, United States 2020 16 12 2020 16 12 2020 4 Suppl 1 Program Abstracts from The GSA 2020 Annual Scientific Meeting “Turning 75: Why Age Matters”576 576 © The Author(s) 2020. Published by Oxford University Press on behalf of The Gerontological Society of America.2020This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.Abstract Cancer and its treatment can induce accelerated aging changes in physiological and behavioral processes. In studies of cancer associated cognitive decline, subjective reports of cognitive impairment are often many times greater than performance deficits on objective tests of neurocognitive functioning. In an Ecological Momentary Assessment study of 47 breast cancer patients (M age = 53.3 years), subjective ratings of cognitive performance and the occurrence of memory lapses assessed at the end of day were predicted by cognitive performance and ratings of fatigue and depressed mood throughout the day. Results indicated that poorer subjective cognition was significantly associated with elevated fatigue throughout the day. Slower processing speed, elevated ratings of fatigue, and depressed mood throughout the day were associated with a greater likelihood of memory lapses. Subjective ratings of cognitive deficits are related to objective performance, as well as common quality of life decrements among cancer survivors.