Published online by Cambridge University Press: 04 February 2010
The subtraction and covariance paradigms are two analytic techniques used with functional neuroimaging data. The first assumes that a brain region participating in a task should show altered neural activity (relative to a control task). The second assumes that tasks are mediated by networks of interacting regions.Images of mind attempts to link results from the subtraction paradigm with a network interpretation that could have been more explicitly done using the covariance paradigm.