Melinda conducts a study in which some participants receive an antidepressant, others receive a sugar pill that they think is an antidepressant, and the rest receive nothing at all. She finds that both the antidepressant group and the sugar pill group report being less depressed than the control group. Melinda has conducted a(n) study and the results for the sugar pill group are likely due to a effect.

Independent groups; Placebo

Explanation:

Experiment

This is simply known as a form of alterations or manipulation of a variable by man to see if changes may occur in behaviour result, thereby giving room or allowing the determination of cause-and-effect relationships.

Independent Variable

This group or variable in an experiment is that which can be altered or manipulated by the researcher/experimenter. Those who participants in a study do not get to choose and their behaviour does not affect this variable at all.

It consist of two levels:

1. Control

2. Experimental

Experimental Hazards

These include:

1. The placebo effect

2. The experimenter effect

Placebo Effect

This is simply regarded as an outcome that occy in which the expectations of the participants in a study can influence the behaviour they express.

If there is a (blank), a control group given a placebo will show changes in the independent variable even though the participants in that group received only a placebo.

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