Question

To control confounding variables in experimental reaearch, researchers can use several techniques. Which one is appropriate to control this problem?

A) Observing subjects all the time

B) Using field experiment

C) Random Assignment

D) Including another variable in the design

Answer 1

A confounding variable can influence the outcome of an experiment in many ways, such as:

1. Invalid correlations.

2. Increasing variance.

3. Introducing a bias.

A confounding variable may be known or unknown. They are often characterized as having an association or correlation with both the independent and dependent variables.

Randomization is a technique used in experimental design to give control over confounding variables that cannot be held constant.

Randomization is a simple tool in experimental design that allows the confounding variables to have their effect across a sample. It shifts the experiment from looking at an individual case to a collection of observations, where statistical tools are used to interpret the finding.

Hence option C is correct.

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