An event that is directly manipulated by the experimenter in order to test its effect on another variable

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What is a dependent variable?

A measurable outcome of an action on the independent variable

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What is a hypothesis/alternative hypothesis?

A precise and testable statement about the assumed relationship between variables

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What is a null hypothesis?

An assumption that there is no relationship in the population from which a sample is taken with respect to the variables being studied

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What is a directional/one-tailed hypothesis?

A statement which indicates which of the conditions or groups of participants will be higher scoring

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What is a non-directional/two-tailed hypothesis?

A statement which predicts there will be a difference between two conditions or two groups of participants without stating which will be the highest scoring

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What is operationalisation?

Defining a variable in a form that can easily be tested

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What is Independent Measures Design (IMD)?

There are a different set of participants for each condition being tested

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What is Repeated Measures Design (RMD)?

The same set of participants are used for the conditions being tested

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What is Matched Pairs Design (MPD)?

Each participant for the first condition is matched with a different participant (with similar characteristics to themselves) for each condition

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What is the mean?

A statistical or arithmetic average

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Give an advantage of the mean

1) it's the most sensitive measure of the three 2) it takes all the scores into account

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Give a disadvantage of the mean

1) it can be impacted by extreme values therefore making it unrepresentative

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What type of data is the mean used for?

Interval Data

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What is the median?

The middle score after the data is ordered

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Give an advantage of the median

1) it's unaffected by extreme scores therefore more appropriate than the mean where there are extreme scores

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Give a disadvantage of the median

1) it only takes into account the middle one or two values

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What type of data is the median used for?

Ordinal Data

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What is the mode?

The most frequently occurring score

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Give an advantage of the mode

1) it is unaffected by extreme scores

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Give a disadvantage of the mode

1) it can be greatly impacted by the change in one score therefore becoming unrepresentative

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What type of data is the mode used for?

Nominal Data

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Other cards in this set

Card 2

Front

What is a dependent variable?

Back

A measurable outcome of an action on the independent variable

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