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. 2019 Aug;117:266–276. doi: 10.1016/j.cortex.2019.03.015

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© 2019 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 2 — Two-step task performance under ccPAS conditions. The weighting of goal-directed (model-based: closer to w = 1) to habitual control (model-free: closer to w = 0) following control stimulation (grey points), lateral prefrontal cortex (LPFC) → intraparietal sulcus (IPS) 10 msec interval ccPAS (pink points), and following IPS→LPFC 10 msec interval ccPAS (teal points). In the IPS→LPFC condition, participants significantly shifted toward model-based (goal-directed) and away from model-free (habitual) control of behaviour, compared to the control condition (non-parametric test, p = .028). Red line = median; blue dotted line = mean; purple patch = standard error of the mean; * = p < .05.