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Meditation (Vipassana) and the P3a event-related brain potential.

B Rael Cahn, John Polich

International Journal of Psychophysiology April 1, 2009 DOI: 10.1016/j.ijpsycho.2008.03.013 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Within-subjects experimental design Peer reviewed
Population Experienced Vipassana meditators
Intervention Vipassana meditation
Topics Meditation
Key findings Meditation state reduced P3a amplitude to distracting stimuli, reflecting decreased automated reactivity and evaluative processing of task-irrelevant attention-demanding stimuli.

Abstract

A three-stimulus auditory oddball series was presented to experienced Vipassana meditators during meditation and a control thought period to elicit event-related brain potentials (ERPs) in the two different mental states. The stimuli consisted of a frequent standard tone (500 Hz), an infrequent oddball tone (1000 Hz), and an infrequent distracter (white noise), with all stimuli passively presented through headphones and no task imposed. The strongest meditation compared to control state effects occurred for the distracter stimuli: N1 amplitude from the distracter was reduced frontally during meditation; P2 amplitude from both the distracter and oddball stimuli were somewhat reduced during meditation; P3a amplitude from the distracter was reduced during meditation. The meditation-induced reduction in P3a amplitude was strongest in participants reporting more hours of daily meditation practice and was not evident in participants reporting drowsiness during their experimental meditative session. The findings suggest that meditation state can decrease the amplitude of neurophysiologic processes that subserve attentional engagement elicited by unexpected and distracting stimuli. Consistent with the aim of Vipassana meditation to reduce cognitive and emotional reactivity, the state effect of reduced P3a amplitude to distracting stimuli reflects decreased automated reactivity and evaluative processing of task irrelevant attention-demanding stimuli.

Comparable studies

Other experimental studies on meditation, most cited first.

Study Year Design Participants
The benefits of being present: Mindfulness and its role in psychological well-being. Cancer patients (clinical intervention study) 2003 Mixed methods: scale development, correlational, quasi-experimental, laboratory, experience-sampling, and clinical intervention study
Loving-kindness meditation increases social connectedness. 2008 Controlled laboratory experiment
Mindfulness and mind-wandering: Finding convergence through opposing constructs. 2012 Two studies: correlational study and experimental study
Mental Training Enhances Attentional Stability: Neural and Behavioral Evidence 2009 Experimental study
Mindfulness meditation and substance use in an incarcerated population. Incarcerated population 2006 Quasi-experimental with treatment-as-usual control condition

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