Individual differences | Methods | Statistics | Clinical |
Educational | Industrial | Professional items | World psychology
| The use of the word "Energy" in psychological studies is
comparatively new. although it was in use, in a casual sense,
before the modern scientific concept of energy was fully
developed. The word "energy" is sometimes used in a casual sense
as a synonym for psychological motivation, creativity,
agitation, excitement, or responsiveness. "Fatigue" or a "lack
of energy" can be either a result of expending chemical energy
in the body or glucose and its derivatives in the brain, or a
psychological condition brought on by an excess of intellectual
activity, intense emotional experiences, inadequate sleep, or an
imbalance or natural fluctuation in hormones and
neurotransmitters. Emotional "exhaustion" is thought to be
brought on not by a lack of energy in the body, but by a
particular chemical state of the brain. Low motivation is
associated with both malnutrition, which is often expressed as