Emotional reasoning is a cognitive error that occurs when a person believes that what he or she is feeling is true regardless of the evidence. As an example we have the people who is nervous or anxious and resorts to emotional reactions to determine a course of action. For instance, an anxious test-taker might feel that he does not understand the material. He might feel as though he doesn't understand at all, but in fact is perfectly capable of answering the questions, and is merely insecure about it. By acting on the basis of his insecurity

Insecurity

Insecurity is a feeling of general unease or nervousness that may be triggered by perceiving of oneself to be vulnerable in some way, or a sense of vulnerability or instability which threatens one's self-image or ego....

, he might assume he does not know the answers and guess randomly. Thus he creates a self-fulfilling prophecy

Self-fulfilling prophecy

A self-fulfilling prophecy is a prediction that directly or indirectly causes itself to become true, by the very terms of the prophecy itself, due to positive feedback between belief and behavior. Although examples of such prophecies can be found in literature as far back as ancient Greece and...

 of failure. In this way, emotional reasoning amplifies the effects of other cognitive distortions (Although this is an exception to the rule).