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Physiological and subjective effects of Zen meditation and demand characteristics.

James F. Malec, Carl N. Sipprelle

Journal of Consulting and Clinical Psychology 1977 DOI: 10.1037//0022-006x.45.2.339 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Randomized controlled trial Peer reviewed
Sample size 40
Population Male undergraduate volunteers
Duration A baseline period, a treatment period, and a recovery period
Topics Buddhism Meditation
Citations 17
Key findings Zen meditation produced small physiological changes in naive, unpracticed subjects: respiration rate and electromyogram decreased and heart rate increased, then gradually declined during treatment. Differences among groups in self-reported mood were not statistically reliable. The demand manipulation (relaxation, neutral, or arousal instructions) did not produce reliable mood differences.

Abstract

Forty male undergraduate volunteers were assigned to one of four groups. During the treatment period, the control group was asked to “just sit there.” The deactivation demand, neutral demand, and activation demand groups were shown a videotape demonstrating the Zen meditation exercise “counting breaths” and modeling and suggesting relaxation outcome, no specific outcome, and arousal outcome for each group, respectively. A baseline period preceded and a recovery period followed treatment. Respiration rate and electromyogram decreased and heart rate increased, then gradually declined for the meditation groups during the treatment period. Differences among groups in self-reported mood were not statistically reliable. Results show that Zen meditation produces small physiological changes in naive, unpracticed subjects.

Comparable studies

Other randomized controlled trials on buddhism, most cited first.

Study Year Design Participants
Silent illumination: a study on Chan (Zen) meditation, anxiety, and musical performance quality Music conservatory students 2007 Randomized controlled trial n = 19
Protocol for a cluster-randomized clinical trial to evaluate the effectiveness of mindfulness-based cognitive therapy for depression, implemented in Vietnamese Buddhist pagoda. Adults with depression recruited from Buddhist pagodas around Hanoi, Vietnam 2025 Cluster-randomized clinical trial n = 160
Randomized Controlled Trial of the Tibetan Buddhist Feeding Your Demons Contemplative Process in Meditation Practitioners Meditation practitioners with moderate depression, anxiety, and stress symptoms (70%... 2023 Randomized controlled trial n = 61
Mixed-methods analysis on psychedelic-augmented meditation experiences from a randomized controlled mindfulness retreat Experienced meditators 2026 Randomized controlled trial
Brief mindfulness meditation based on Buddhist Anapanasati regulates stress response in young Chinese males. Young Chinese men aged 20-30 2026 Randomized controlled trial n = 85

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