http://www.jpsychores.com/article/S0022-3999(11)00212-1/abstract From the paper: How do you know what that is? What are they suggesting acceptance of then? This paper doesn't really seem to say. How are people supposed to know what level of disability should be 'accepted', and what can be changed? Does anyone know more about what 'acceptance' would tend to mean in these contexts? Having read the paper, I still don't really know. For things like anxiety, there's Acceptance of Commitment Therapy, but this paper seem to be talking of acceptance of fatigue, rather than cognitions. Hopefully someone here will be better informed about this stuff than I. re perfectionism, high standards, etc: Knowing what standards one should set for oneself is difficult without access to meaningful information about whether one faces long-term restrictions in capacity or not. If one is (for example) being wrongly encouraged to believe that one's reduction in capacity following a severe case of glandular fever is a result of deconditioning and a fear of exercise which can be reversed by behavioural change, then this quackery would be likely to lead to inappropriate standards being set. That seems to be the a common problem when someone's cognitions are managed with inaccurate information.