Relationships are an ideal context within which to explore correlations in psychophysiological and brain imaging data, but correlational analyses in functional magnetic resonance imaging are often poorly understood, and fears of non-independent correlational “voodoo” may arouse concern whenever they are used. This paper illustrates how correlations have been used to measure both within-relationship and within-subject covariance in ways that illuminate important relationship processes and linkages. We will outline historical and contemporary examples of correlational approaches that have been utilized in unique and important ways in relationship research, and discuss our own research using innovative correlational approaches to explore interpersonal empathy and identification.
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