Correlations in Social Neuroscience Aren't Voodoo: Commentary on Vul et al. (2009).
Correlations in Social Neuroscience Aren't Voodoo: Commentary on Vul et al. (2009).
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社会神经科学的相关性不是Voodoo:对Vul等人的评论。 (2009)。
DOI:
10.1111/j.1745-6924.2009.01128.x
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发表时间:
2009-05
期刊:
影响因子:
--
通讯作者:
Wager TD
中科院分区:
文献类型:
--
作者:
Lieberman MD;Berkman ET;Wager TD
, this issue) claim that many brain–personality correlations in fMRI studies are “likely…spurious” (p. 274), and “should not be believed” (p. 285). Several of their conclusions are incorrect. First, they incorrectly claim that whole-brain regressions use an invalid and “nonindependent” two-step inferential procedure, a determination based on a survey sent to researchers that only included nondiagnostic questions about the descriptive process of plotting one’s data. We explain how whole-brain regressions are a valid single-step method of identifying brain regions that have reliable correlations with individual difference measures. Second, they claim that large correlations from whole-brain regression analyses may be the result of noise alone. We provide a simulation to demonstrate that typical fMRI sample sizes will only rarely produce large correlations in the absence of any true effect. Third, they claim that the reported correlations are inflated to the point of being “implausibly high.” Though biased post hoc correlation estimates are a well-known consequence of conducting multiple tests, Vul et al. make inaccurate assumptions when estimating the theoretical ceiling of such correlations. Moreover, their own “meta-analysis” suggests that the magnitude of the bias is approximately .12—a rather modest bias.
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