Question

Give four techniques to control extraneous variables?

Answer 1

Answer:

1)Randomization

2)Matching

3)The use experimental designs

4)Statistical Control

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Answer 2

Answer:

1. randomisation: in this approach treatments are randomly assigned to the experimental groups it is assumed that the extraneous factors are present equally in all the groups. this technique is only workable when the sample size is a very large.
2. matching: another important technique is to match the different groups of confounding variables. different confounding variables like gender, age, income etc.. could be distributed equally amongst the groups. it sometimes does becomes difficult to extend matching within all the groups and another drawback of the same is that, sometimes the matched characteristics maybe irrevallent to the dependent variable.
3. the use experimental designs : it certain studies the experimental designs may play a crucial role in reducing or completely removing the role and impact of extraneous variables.
4. statistical control: there may be situations, when all the above mentioned methods to control the extraneous variables do not show any significant outcome it brings the entire research into questions as then casual inferences are difficult to make another method that may work to bring down the effect of extraneous variables is the method of statistic control among the various statistical tools and techniques , analysis of covariance (ANOVA) helps in reducing the impact of the extraneous factors on the study.

this four methods, in their own way can be used in the research , collectively o exclusively to eliminate the relationship impacted discussed about, it is dependent upon the expertise of the research and to understand and administer this method in a way that the best possible results can be obtained.

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