METHODS OF RESEARCH
COMPARATIVE RESEARCH
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the inability to identify associations among variables
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the inability to manipulate the independent variable
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Causation cannot be fully established
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the instrumentation used is limited
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Detailed explanation-1: -Two weaknesses in causal-comparative research are lack of randomization and inability to manipulate an independent variable. As we have mentioned, random assignment of subjects to groups is not possible in causal-comparative research since the groups are al-ready formed.
Detailed explanation-2: -Because causal-comparative research occurs ex post facto, the researcher has no control over the variables and thus cannot manipulate them.
Detailed explanation-3: -However, there are drawbacks of causal-comparative research too, such as its inability to manipulate or control an independent variable and the lack of randomization. Subject-selection bias always remains a possibility and poses a threat to the internal validity of a study.
Detailed explanation-4: -Causal-Comparative Research Facts-Does not establish cause-effect relationships.-Generally includes more than two groups and at least one dependent variable.-Independent variable is causal-comparative studies is often referred to as the grouping variable.-The independent variable has occurred or is already formed.