A precise, testable statement about the expected outcome of an investigation.
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Aim
Aim
A general statement about the purpose of the investigation.
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Experiment
Experiment
A research investigation in which one specific variable is manipulated to observe its effect on another specific variable, while keeping all other variables controlled. In a true experiment participants are randomly allocated to conditions or take part in all.
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Variable
Variable
A measureable characteristic or value that can differ from one person to another or have multiple values.
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Experimental Hypothesis
Experimental Hypothesis
A hypothesis used in the context of an experiment.
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Alternative Hypothesis
Alternative Hypothesis
Any hypothesis that is not the null.
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Correlational Study
Correlational Study
An investigation into the possible association of two variables.
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Operationalising
Operationalising
The process of devising a way of measuring a variable.
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Internal Validity
Internal Validity
A research study or experiment has internal validity if the outcome is the result of the variables that are manipulated in the study.
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External Validity
External Validity
The extent to which findings can be generalised to settings other than the research setting.
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