Thirty phobic and thirty nonphobic

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Thirty phobic and thirty nonphobic individuals are shown slides of either fear-inducing scenes or non-fear-inducing scenes. Measures of brain functioning (PET scans and electroencephalogram) show higher levels of arousal in phobic individuals, but only when they observe the fear-inducing slides.
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What are the weaknesses of this type of research?

Reference no: EM13142828

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