RESEARCH METHODS THINKING CRITICALLY WITH PSYCHOLOGICAL SCIENCE
THE NEED FOR PSYCHOLOGICAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Can affect the measurement of the independent variable
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Means that only the uncontrolled variables are measured
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Do not enable the researcher to control the dependent variable
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Negatively impact the generalisability of a study
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Detailed explanation-1: -By using a consistent environment, experimental design, and randomization, researchers can minimize the effect that potential extraneous variables can have on experiment.
Detailed explanation-2: -Control Through Sampling As discussed previously, random sampling is often the best approach to obtain a representative sample. Random sampling not only controls several extraneous variables, it also allows us to generalize to a given population (increases external validity).
Detailed explanation-3: -A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable (i.e. confounding variables). This increases the reliability of the results, often through a comparison between control measurements and the other measurements.
Detailed explanation-4: -An extraneous variable is any variable that you’re not investigating that can potentially affect the dependent variable of your research study. A confounding variable is a type of extraneous variable that not only affects the dependent variable, but is also related to the independent variable.