The data is that more fidgeting and grooming correlated with higher SES, and more nodding, agreeing and eybrow raises correlated with lower SES. There's no link to the study itself, but there's no support in this article how they established causation, and further, even with causation established, that the behaviors are for the reason they give.
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The data is that more fidgeting and grooming correlated with higher SES, and more nodding, agreeing and eybrow raises correlated with lower SES. There's no link to the study itself, but there's no support in this article how they established causation, and further, even with causation established, that the behaviors are for the reason they give.