Tips on Understanding and Remembering the Three Types of Hypotheses
The three types of hypotheses can seem confusing at first, so it is helpful to devise tips for understanding and remembering their differences. The three hypotheses -- null, nondirectional and directional -- can best be described in the following terse manner: null means no relationship between variables; nondirectional means that there is a relationship or difference between variables but the hypothesis is not concerned with the outcome of the relationship/difference -- only with the fact that the relationship/difference exists; and directions means that the outcome is important to the hypothesis. To put it even more simply, null means no relationship/difference; nondirectional means relationship/difference; directional means outcome of relationship/difference (Elwell, 2013).
The tips to remembering these three types of hypotheses can include spending time examining many different examples of hypotheses and identifying their type. For instance, the resource text provides examples of each and these can be used as a base for generating a solid idea of what hypotheses in each category look like, how they are formed, what their purpose is, etc. As Mills and Gay (2016) point out, a hypothesis should be clearly defined, so it is helpful to identify the defined aspects of the hypothesis and see what it is driving at -- whether it is talking...
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