Post-decisional dissonance refers to:

Post-decisional dissonance specifically refers to the psychological conflict or discomfort that arises after making a decision, particularly when one reflects on the choice and considers the potential drawbacks of the chosen option alongside the benefits of alternatives that were not selected. This phenomenon is a key aspect of cognitive dissonance theory, where individuals strive for internal consistency. After making a choice, especially if it holds significant consequences or involves strong preferences, one might feel tension if they question whether they made the right decision, thus leading to feelings of discomfort or unease.

In this context, the other options do not accurately capture the essence of post-decisional dissonance. The dissonance felt before making a choice relates to pre-decision anxiety, while the concept of non-commitment describes a state where no decision has been made at all. Feelings of regret may stem from the contemplation of past experiences but are not precisely the same as the conflict that arises immediately after a choice has been made.