Dr Pillay is interested in whether exposure to TV advertisements has a different impact on girls' self-image than it does on boys' self-image. To examine this question, she conducts a quasi-experiment. Why doesn't Dr Pillay conduct a true experiment instead?

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She could conduct a true experiment if she wanted to, but she is probably interested in  real-life  TV exposure (and probably doesn't want to manipulate this variable).

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She could conduct a true experiment if she wanted to, but she probably has a very small sample size, so in this case a quasi-experiment is better.

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She cannot conduct a true experiment, because people cannot be randomly assigned to be  girls  or  boys.

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She cannot conduct a true experiment, because self-image is not directly observable.

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Dr Pillay is interested in whether exposure to TV advertisements has a different...

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