On the correspondence between dream content and target material under laboratory conditions: a meta-analysis of dream-ESP studies, 1966-2016

Storm, L., Sherwood, S. J., Roe, C. A., Tressoldi, P. E., Rock, A. J. and Di Risio, L. (2017) On the correspondence between dream content and target material under laboratory conditions: a meta-analysis of dream-ESP studies, 1966-2016. International Journal of Dream Research. 10(2), pp. 120-140. 1866-7953.

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Item Type:	Article
Abstract:	In order to further our understanding about the limits of human consciousness and the dream state, we report meta-analytic results on experimental dream-ESP studies for the period 1966 to 2016. Dream-ESP can be defined as a form of extra-sensory perception (ESP) in which a dreaming perceiver ostensibly gains information about a randomly selected target without using the normal sensory modalities or logical inference. Studies fell into two categories: the Maimonides Dream Lab (MDL) studies (n = 14), and independent (non-MDL) studies (n = 36). The MDL dataset yielded mean ES = .33 (SD = 0.37); the non-MDL studies yielded mean ES = .14 (SD = 0.27). The difference between the two mean values was not significant. A homogeneous dataset (N = 50) yielded a mean z of 0.75 (ES = .20, SD = 0.31), with corresponding significant Stouffer Z = 5.32, p = 5.19 × 10-8, suggesting that dream content can be used to identify target materials correctly and more often than would be expected by chance. No significant differences were found between: (a) three modes of ESP (telepathy, clairvoyance, precognition), (b) senders, (c) perceivers, or (d) REM/non-REM monitoring. The ES difference between dynamic targets (e.g., movie-film) and static (e.g., photographs) targets was not significant. We also found that significant improvements in the quality of the studies was not related to ES, but ES did decline over the 51-year period. Bayesian analysis of the same homogeneous dataset yielded results supporting the ‘frequentist’ finding that the null hypothesis should be rejected. We conclude that the dream-ESP paradigm in parapsychology is worthy of continued investigation, but we recommend design improvements.
Uncontrolled Keywords:	Bayesian analysis, dream ESP, ESP, meta-analysis, paranormal, psi
Subjects:	B Philosophy. Psychology. Religion > BF Psychology > BF1228 Spiritualism > BF1321 Extrasensory perception B Philosophy. Psychology. Religion > BF Psychology > BF1001 Parapsychology. Psychic research. Psychology of the conscious B Philosophy. Psychology. Religion > BF Psychology > BF1048 Hallucinations. Sleep. Dreaming. Visions > BF1078 Dreams
Creators:	Storm, Lance, Sherwood, Simon J, Roe, Chris A, Tressoldi, Patrizio E, Rock, Adam J and Di Risio, Lorenzo
Publisher:	Universität Heidelberg
Faculties, Divisions and Institutes:	University Faculties, Divisions and Research Centres - OLD > Research Centre > Centre for the Study of Anomalous Psychological Processes Research Centres > Centre for Psychology and Social Sciences
Date:	3 November 2017
Date Type:	Publication
Page Range:	pp. 120-140
Journal or Publication Title:	International Journal of Dream Research
Volume:	10
Number:	2
Language:	English
DOI:	https://doi.org/10.11588/ijodr.2017.2.34888
ISSN:	1866-7953
Status:	Published / Disseminated
Refereed:	Yes
Related URLs:	Full text
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URI:	http://nectar.northampton.ac.uk/id/eprint/10012

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