Delta plots do not reveal response inhibition in lying |
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| Institution: | 1. Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA;2. Department of Psychiatry, University of California San Diego, La Jolla, CA, USA;3. VISN-22 Mental Illness, Research, Education and Clinical Center (MIRECC), VA San Diego Healthcare System, USA;4. Department of Psychiatry and Biobehavioral Sciences, Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA;5. VA Greater Los Angeles Healthcare System, Los Angeles, CA, USA;6. Department of Psychiatry and Behavioral Sciences, Stanford University, Palo Alto, CA, USA;7. Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA;8. VA Puget Sound Health Care System, Seattle, WA, USA;9. Department of Psychiatry, Harvard Medical School, Boston, MA, USA;10. Massachusetts Mental Health Center Public Psychiatry Division of the Beth Israel Deaconess Medical Center, Boston, MA, USA;11. Department of Psychiatry, The Mount Sinai School of Medicine, New York, NY, USA;12. James J. Peters VA Medical Center, New York, NY, USA;13. Department of Biostatistics, University of California Los Angeles School of Public Health, Los Angeles, CA, USA;14. Center for Behavioral Genomics and Institute for Genomic Medicine, University of California San Diego, La Jolla, CA, USA;15. Harvard Institute of Psychiatric Epidemiology and Genetics, Boston, MA, USA |
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| Abstract: | The role of response inhibition in lying is debated. By using the delta-plot method applied to the Sheffield Lie Test, Debey, Ridderinkhof, De Houwer, De Schryver, and Verschuere (2015) provided evidence supporting the role of inhibition in lying. In the study of Debey et al., inhibitory skill was measured in terms of the size of the lie effect. However, to provide convincing evidence that delta plots highlight the role of response inhibition in lying, inhibitory ability must be evaluated independently from the size of the lie effect. After replicating original findings, this article shows that a delta plot analysis does not differentiate individuals with different inhibitory abilities, when inhibitory skill is measured by means of the Stop Signal Task, instead of the size of the lie effect. This suggests that researchers should be cautious when making conclusions about cognitive mechanisms based on the sole analysis of delta plots. |
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| Keywords: | Deception Delta plots Inhibition Sheffield Lie Test Cognitive load |
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