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In the article, Smile and (Half) the World Smiles With You, Frown and You Frown Alone,...

In the article, Smile and (Half) the World Smiles With You, Frown and You Frown Alone, by Hinsz and Tomhave:

What was the internal and external validity in this experiment?

Social-Sciences   Psychology   
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Answer #1

The experiment is internally valid because the activities that the experimenters carried out directly caused the observations that they made. The facial expressions that the respondents showed were prompted by the stimuli facial expressions that the experimenters displayed. Thus, the experiment portrays the causal-effect relationship between the independent and dependent variables. This confirms that it has internal validity thus proving the truth about the inferences that the authors made in the experiment. The experiment also has external validity because its conclusions concur with previous studies that are related to the people’s responses to facial expressions and can be generalized for other populations.

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