“…Anger, hunger, sex, and affiliation are only a few of the many emotional and motivational states. In contrast to these states, evidence suggests the presence of mode specific manifestations of anxiety in different individuals, or in the same individual at different times (Bowman, Roberts, & Giesen, 1978;Corah, 1964;Davidson and Schwartz, 1976;Eysenck, 1961). Thus it is not uncommon for a person who is physically tired and relaxed to lie down, unable to sleep because of a "racing mind."…”