Breast cancer survivors (BCS) have identified attentional fatigue as a frequent and troublesome symptom during and following treatment.
-4The ability to pay attention is necessary to complete tasks and activities, and problem solve. Attention requires ongoing mental effort. For BCS, the prolonged or intense use of attention to address the competing mental demands associated with illness, treatment and daily life activties, can lead to attentional fatigue and result in decreased effectiveness in activity.
5Attentional fatigue, a domain of cognitive function, is often used interchangeably with the terms cognitive dysfunction,cognitive impairment, cognitive fatigue or tiredness. Seminal research, however, delineates attentional fatigue from these other concepts by describing attentional fatigue as a measurable decrease in an individual's ability to focus and concentrate or to block out distractions when carrying out meaningful activities. 6 Hallmark indicators of attentional fatigue are: increased distractibility, difficulty following a train of thought or carrying out usual day-to-day activities, lapses in working memory, and increased impatience or frustration in personal interactions.
7Although the two may coexist, physical and attentional fatigue differ in that an individual may not be physically tired but has a reduced ability to exert mental effort. 8 Researchers have noted that BCS incur attentional fatigue more than age-matched controls 9 and prostate cancer patients.
10Merriman and colleagues, 11 found that up to 63% of