Hypotheses

Looks at the different hypotheses in psychology AS AQA A

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Null Hypothesis

This hypothesis states that there will no effect or change or difference. The independent variable will not effect the dependent variable. Any change/effect is simple down to chance.

Example: Chocolate does not effect weight gain chances. Any changes are down to chance.

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Alternative Hypothesis

This hypothesis states that there will be an effect or change or difference. The independent variable will effect the dependent variable. If it is an experiment then the alternative hypothesis can be called the experimental hypothesis.

Example: Eating chocolate will effect weight gain chances.

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Directional Hypothesis

This can also be called a 'one tailed' hypothesis.

This hypothesis predicts a direction of change.

Example: Caffeine increases heart rate.

                          Chocolate increases the chance of weight gain.

 

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Non Direction Hypothesis

This can also be called a 'two tailed' hypothesis.

This hypothesis predicts a change but not the direction in which the change will happen in.

Example:       Caffeine affects your heart rate.

                        Chocolate affects the chances of weight gain.

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