A researcher is interested in the effects of a preschool program on later school performance. Because she is concerned that socio-economic-status (SES) is a potential extraneous variable in her study, she picks^&tyldren to study who are only from low SES homes. The control technique she used in this study was- ----

Related MCQs

• There is a number of ways in which confounding extraneous variables can be controlled. Which control technique is considered to be the best?
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• The sort of variable manipulated by the researcher is -........
• The variable the researcher matches to eliminate it as an alternative explanation is called a_________variable.
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• A variable that is presumed to cause a change in another variable is called as ………..
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