Parapsychology and psi

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Discussion of parapsychology, the science that investigates psi phenomena.

Psi refers to things like extrasensory perception, telepathy, precognition, and psychokinesis.

Scientific investigation refers to things like double-blind randomised trials.

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Daryl Bem's 2011 paper on presentiment (lemmy.ml)
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In 2011, Daryl Bem published 'Feeling the future: Experimental evidence for anomalous retroactive influences on cognition and affect' (DOI: 10.1037/a0021524). PDF

Presentiment is a feeling that anticipates the future. When you show someone an erotic picture, their skin-conductance goes up more than if you show them a bland picture. In a presentiment study, they are shown random pictures, and it's found that their skin-conductance goes up a moment before the erotic picture appears. Feeling the Future.

Here is a 2022 replication study (negative finding): https://www.kog.psy.unibe.ch/unibe/portal/fak_humanwis/philhum_institute/inst_psych/psy_kog/content/e48297/e48316/e702309/e756838/files1310124/MuhmenthalerDubravacMeier_PoC2022_ger.pdf

And a 2012 replication study (negative finding): https://core.ac.uk/download/pdf/6117654.pdf

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[PDF] Two skeptical researchers replicate the results of parapsychology researchers (scholar.archive.org)
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It's a paper about replicability, meta-analyses, whether the scientific method can be trusted.

They say publication bias is a big problem, and for that reason we see absurd results in the literature. Like the way meta-analyses of ganzfeld studies show find a 32% rate of correctly guessing 'transmitted' images, instead of the 25% rate you'd get from chance.

To show how the published literature is different from real experimental results (to prove their point about publication bias), they do eight ganzfeld studies.... and get a 32% hit-rate.

Discussion here: https://psi-encyclopedia.spr.ac.uk/articles/delgado-romero-and-howard-telepathy-experiments