When emotionally upset people tend not to be able to learn, remember, make decisions clearly, pay attention. (Goleman, Daniel, PhD. Emotional Intelligence. p 148-150. NY: Bantam Books, 1995.)

Attention can become divided among the three brain layers when person is anxious, undecided, tense, etc. Each brain layer has its own agenda so person may think one thing, feel another, and act from completely different impulses. (Pearce, Joseph Chilton. The Biology of Transcendence. p 32-34. VT: Park Street Press, 2002.)