Independent & Dependent Variables

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Presentation transcript:

Independent & Dependent Variables Research Methods Independent & Dependent Variables

Independent Variables The independent variable is the thing the psychologist changes or manipulates when conducting an experiment. This is to try and discover a cause-effect relationship between the IV and the dependent variable.

An example of an independent variable: whether participants in a memory experiment were asked to make a story out of a list of words (to help them memorise the words) or given no instructions on how to memorise the words

Dependent Variables The name given to the variable in experimental research that measures/ observes any change in animal or human behaviours as a result of their exposure to the independent variable.

As a consequence we can discover if the change or manipulation of an independent variable has caused, or had an effect on how we think, feel, or behave; this change being measured as the dependent variable

The dependent variable for a memory experiment could be: Example… The dependent variable for a memory experiment could be: The number of words recalled

Test… You must decide which of the following are IVs or DVs… Giving ppts either alcohol or juice Ppts ability to drive safely Whether ppts memorised words at the bottom of the ocean or on the beach The number of anagrams solved in 2 minutes The attention span of a gold fish The time of day

Now you need to have a go… See IV – DV activities in the Science Pack 