Intervention theory
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The intervention theory of the origin of terrestrial life is a group of alternative hypotheses of the origin of life on this planet. Intervention theories postulate that life was deliberately introduced to this planet by intelligent extraterrestrial beings - contrast this with panspermia theory, which hypotheses that simple life was introduced to Earth through unintelligent mechanisms.
Intervention theories may be coupled to the operation of evolution (through natural selection or other mechanisms), or may be concerned only with the introduction of human life (see Lloyd Pye). Some intervention theories (generally those that postulate intervention after some life had developed) are fully testable hypotheses, and although philosophically interesting, have little supporting evidence. Though renowned researcher Lloyd Pye poses many interesting questions, with supporting facts and ideas which are seldom accepted my mainstream scientists. Philosophers sometimes draw attention to the existence of intervention theories and panspermia theory to dispel claims of a false dichotomy between creationism and evolution by some proponents of intelligent design.
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[edit] Intervention Theory
Intervention Theory is a nursing theory included within a larger scope of practice theories. Burns and Grove points out, "directs the implementation of a specific nursing intervention and provide theoretical explanations of how and why the intervention is effective in addressing a particular patient care problem. These theories are tested through programs of research to validate the effectiveness of the intervention in addressing the problem."(Understanding Nursing Research, 2007).
