Here’s a wonderful brief article on excuse making (Psychology Today, August 2014, p. 22--doesn't seem to be online yet), a topic
covered in the Interpersonal Communication Book and Interpersonal Messages by
Amy Nordrum. Among the conclusions are these: (1) Excuses
work; they can often deflect/stave off/lessen retaliation. (2) Too
frequent excuses--such as self-handicapping excuses--will lead to a loss of
faith. (3) Effective
excuses accomplish two goals: (a) they accept responsibility and offer
assurances that this will not happen again and (b) they show empathy for the
difficulties they caused.