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To be fair it's understandable, words appear easier to relate to than numbers; a view which tends to be reinforced further when students first encounter the experimental method with its strong statistical component and abstract terminology. Terms like extraneous variable, independent variable etc are enough to put most people off before they start.
The primary aim of this tutorial then, is to show you that the experimental method isn't nearly as complicated or as frightening as many people think.
The following material is based on an introductory research methods course that I cowrote with my very good friend and old colleague Dr David Tyfa.