Stimulated salivation: Correlations with personality and time of day effects |
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| Institution: | 1. Department of Psychology, University of Edinburgh, 7 George Square, Edinburgh EH8 9JZ, Scotland;2. Department of Otolaryngology, University of Edinburgh, Royal Infirmary, Edinburgh EH3, Scotland;1. School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece;2. Department of Biomedical Engineering, Faculty of Technological Applications, Technological Educational Institute of Athens, Agiou Spyridonos Str., Egaleo 12243, Greece;3. Laboratory of Sensorimotor Control, University Mental Health Research Institute, Athens, Greece;4. Psychiatry Department, National and Kapodistrian University of Athens, Eginition Hospital, Athens, Greece;1. Department of Clinical Neurophysiology, Oulu University Hospital, Finland;2. Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Finland;3. Department of Psychology and Speech-Language Pathology, Speech-Language Pathology, University of Turku, Finland;1. Institute of Research & Technology b<>com, 1219 Avenue des Champs Blancs, 35510 Cesson-Sévigné, France;2. University of Rennes, France;1. Université Pierre et Marie Curie, CNRS UMR 7225-INSERM UMRS S975, Centre de Recherche de l''Institut du Cerveau et la Moelle (ICM), Paris, France;2. Laboratory for Cerebral Dynamics Plasticity & Rehabilitation, Boston University School of Medicine, Boston, MA, USA;3. Cognitive Neuroscience and Information Technology Research Program, Open University of Catalonia (UOC), Barcelona, Spain;1. Research Centre for Brain and Behaviour, Liverpool John Moores University, UK;2. School of Natural Sciences and Psychology, Liverpool John Moores University, UK |
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| Abstract: | Several studies which report a negative correlation between extraversion and salivation stimulated by lemon juice or synthetic equivalents are reviewed. We report a replication of this finding together with a corroboration of the impression that the correlation holds in the morning (r = -0.74, P < 0.01) but not in the afternoon. We find that stimulated salivation also correlates with psychoticism (r = -0.58, P < 0.05) and sensation seeking (r = -0.58, P < 0.05). Extraversion correlated significantly with sensation seeking in the afternoon group and with psychoticism in the morning group. The salivation results suggest that extraversion and sensation seeking (and perhaps also psychoticism) share a physiological basis. The time of day effects reported for the personality variable correlations are novel but require further study in a larger population. |
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