Consistency Theory - Commiment & Consistency

The discomfort of cognitive dissonance occurs when things fall out of alignment, which leads us to try to achieve a maximum practical level of consistency in our world. When our inner systems (beliefs, attitudes, values, etc.) all support one another and when these are also supported by external evidence, then we have a comfortable state of affairs.

When there is conflict between behaviors that are consistent with inner systems and behaviors that are consistent with social norms, the potential threat of social exclusion often sways us towards the latter, even though it may cause significant inner dissonance.

Ways we achieve consistency between conflicting items include:
Denial or ignoring : 'I didn't see it happen.'
Rationalization and excuses : 'It was going to fall anyway.'
Separation of items :'I don't use my car enough to make a difference .'
Transcendence : 'Nobody is perfect.'
Changing item : 'I'll be more careful next time.'
Persuasion : 'I'm good, really, aren't I?'
Example
If you make a promise, you will feel bad if you do not keep it.

Defending
You will always be inconsistent in some areas. When changing to fit in with the inconsistencies that someone else is pointing out, think about the other, potentially more serious, inconsistencies that you will be opening up.

Read also : Principle of Influence - Commitment & Consistency