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Reigeluth and Merrill: Three Major Components of a Theory of Instruction

1) methods - different ways to achieve different outcomes under different conditions
2) conditions - factors that influence the effects of methods and are therefore important for prescribing methods
3) outcomes - the various effects that provide a measure of the value of alternative methods under different conditions (actual or desired) (kinds: efficiency, effectiveness and appeal of instruction)


"Something that is a method variable in one school (because the teacher can change it) may be a condition variable in another school (because the teacher cannot change it)."

Reigeluth, 1983, p. 14-15
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