Define extraneous variable and confounding variable

Reference no: EM131307607

1. Define extraneous variable and confounding variable. Describe two methods used to prevent extraneous variables from becoming confounding variables.

2. In an experiment, participants are usually assigned to treatments using a random assignment procedure. Explain why random assignment is used.

3. Describe and differentiate a no-treatment control group and a placebo control group.

4. Explain why simulations and field studies are used.

Reference no: EM131307607

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