A variable is any factor, trait, or condition that can have different values, change in variable influences the outcome of experimental research
The variable is the factor you might measure in an experiment.
Three types of variables:
1. Independent variable: The variable that researcher changes or the researcher think it will affect the dependent variable
2. Dependent variable: The variable that is affected by change in independent variable
3. Controlled variable: The variable that is kept constant or same throughout the experiment.
Independent variable vs Dependent variable
Independent variable
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Dependent variable
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Independent variable is the variable that the researcher changes in an experiment.
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Dependant variable is the variable that researcher thinks will be affected by change in independent variable
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Usually denoted by ‘x’
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Usually denoted by ‘y’
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It is the ‘cause’ or reason that the researcher assumes to influence dependent variable
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It is the ‘effect’ or ‘outcome’ caused by the change in independent variable
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The values of independent variable are manipulated by the researcher
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The values of dependent variable are observed and measured by the researcher in an experiment
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The value of independent variable can be changed
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The value of dependent variable cannot be changed
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