Aim
A general statement about the purpose of the investigation
Hypothesis
A Precise statement about the expected outcome of the investigation. Usually based on previous observations. Prediction not a theory
Experimental hypothesis:
A hypothesis used in the context of the experiment. Also called the alternative hypothesis
e.g. Boys are better than girls at football
Null Hypothesis:
Tends to state that there is NO effect on the two variables
e.g. Gender has no significant effect on colour blindness
There is no difference between the findings of the observed variables
Directional Hypothesis:
Sometimes the hypothesis will predict the direction that the results are expected to go
e.g. Boys will be significantly more aggressive than girls
Non-directional:
The hypothesis does not state the direction but states that one variable will effect the other or that there will be a difference between the two sets of scores
e.g. Gender will have a significant effect on levels of aggression
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