The study isn't about the effects of reading SF, it is about the effects of the reader having anti-SF biases.
From one of the author's of the study:
Quote:
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“So when readers who are biased against SF read the word ‘airlock’, their negative assumptions kick in – ‘Oh, it’s that kind of story’ – and they begin reading poorly. So, no, SF doesn’t really make you stupid. It’s more that if you’re stupid enough to be biased against SF you will read SF stupidly.”
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