I'm sympathetic — show me the weak spots
Start with the strongest critical arguments, move through failed replications and methodology concerns, then see how proponents respond. This path is designed to stress-test your priors.
Searching for the Impossible: Parapsychology's Elusive Quest
Reber & Alcock (2019)
The deepest skeptical challenge: psi is ruled out on theoretical grounds before any data are examined. Begin with the hardest objection.
Give the Null Hypothesis a Chance
Alcock (2003)
A methodological and philosophical critique arguing that parapsychology systematically fails to give the null hypothesis a fair hearing.
Does Psi Exist? Lack of Replication of an Anomalous Process of Information Transfer
Milton & Wiseman (1999)
A direct meta-analytic response to Bem & Honorton (1994), finding that post-autoganzfeld studies fail to replicate. Title deliberately mirrors the original.
Failing the Future: Three Unsuccessful Attempts to Replicate Bem
Ritchie, Wiseman & French (2012)
Three pre-registered, independent attempts to replicate Bem's (2011) precognition experiments. All three fail.
Can Animals Detect When Their Owners Are Returning Home?
Wiseman, Smith & Milton (1998)
The direct skeptical test of Sheldrake's most famous claim. Same dog, same owner, overlapping time period, opposite conclusions. Read back-to-back with Sheldrake & Smart (2000) (`sheldrake_2000_that`) to see how analytical choices determine verdicts: Wiseman's binary signal-detection criterion yields null; Sheldrake's proportional time-at-window analysis yields significance.
Correcting the Past: Failures to Replicate Psi
Galak et al. (2012)
Seven additional replication failures of Bem (2011), plus a meta-analysis suggesting the original effect is indistinguishable from zero.
A Bayes Factor Meta-Analysis of Recent ESP Experiments
Rouder et al. (2013)
Re-examines Storm et al.'s (2010) data through a Bayesian lens and finds the evidence for psi is weaker than claimed.
The Capricious, Actively Evasive, Unsustainable Nature of Psi: A Summary and Hypotheses
Kennedy (2003)
Documents the persistent pattern of psi effects appearing and disappearing unpredictably across laboratories and time. Proposes that psi is inherently elusive — a fundamental challenge for any research program. Essential for understanding why psi remains controversial despite decades of study.
Information in Life, Consciousness, Quantum Physics, and Paranormal Phenomena
Kennedy (2011)
Kennedy's mature theoretical framework integrating information theory, quantum physics, and parapsychology. Proposes supernatural agency model: paranormal phenomena result from external agencies with spiritual motivations rather than being human abilities. Explains why psi defies experimental control and cannot be used for practical applications. Read after Kennedy (2003) to see how the "capricious psi" observations led to an alternative theoretical model.
Examining Psychokinesis: The Interaction of Human Intention With Random Number Generators — A Meta-Analysis
Bösch, Steinkamp & Boller (2006)
Meta-analysis of 380 RNG-PK studies in Psychological Bulletin. Finds a significant but tiny overall effect, then demonstrates via Monte Carlo simulation that publication bias could account for the small effect, extreme heterogeneity, and small-study effect. Concludes "not proven."
We Should Have Seen This Coming
Schwarzkopf (2014)
Argues that Bem (2011) exposed weaknesses in standard statistical practice rather than demonstrating psi. A lessons-learned piece for methodology.
Why Most Published Research Findings Are False
Ioannidis (2005)
The mathematical foundation for the replication crisis. Derives PPV formulas proving that for most research designs, statistically significant findings are more likely false than true. Six corollaries map directly onto psi research: small samples, small effects, multiple testing, analytical flexibility, investigator commitment, and competitive fields. Essential before reading Simmons (2011) and Rabeyron (2020), which build on this framework.
False-Positive Psychology
Simmons, Nelson & Simonsohn (2011)
Published the same year as Bem (2011). Demonstrates that four common researcher degrees of freedom inflate false-positive rates to 60.7% when combined, and produces significant evidence (p=.040) for an impossible hypothesis. Coined "researcher degrees of freedom" — the concept that underpins critiques of all psi research involving analytic flexibility.
Equivalence Tests: A Practical Primer for t Tests, Correlations, and Meta-Analyses
Lakens (2017)
Provides the statistical tool (TOST equivalence testing) for formally testing whether effects are small enough to be considered practically equivalent to zero. Essential for replication studies to distinguish "inconclusive" from "evidence for null" — directly applicable to evaluating Bem FTF replications and Ganzfeld failures.
Why Most Research Findings About Psi Are False
Rabeyron (2020)
Applies Ioannidis-style reasoning to psi research, arguing that low base rates and researcher degrees of freedom make most positive findings illusory.
Cross-Examining the Case for Precognition
Houran et al. (2018)
A focused critique of the presentiment literature, questioning both the meta-analytic methods and the underlying experimental designs.
Estimating the Reproducibility of Psychological Science
Open Science Collaboration (2015)
The broader replication crisis in psychology. Context for understanding that psi's problems are partly psychology's problems.
Decline Effects: Types, Mechanisms, and Personal Reflections
Protzko & Schooler (2017)
Taxonomizes four types of decline effects with conventional explanations. Protzko argues declines are Type I errors; Schooler entertains unconventional observer mechanisms. Read for the most sophisticated conventional account of why psi effects shrink on replication.
Entertaining Without Endorsing
Schooler, Baumgart & Franklin (2018)
A prominent cognitive psychologist's epistemological framework: use Bayesian reasoning to justify a liberal criterion for investigating psi while maintaining a strict criterion for endorsing it. Proposes nine concrete criteria for endorsement. The middle-ground position, rigorously argued.
Feeling the Future: A Meta-Analysis of 90 Experiments on Anomalous Anticipation
Bem et al. (2015)
Now read the pro-psi response. Ninety experiments pooled together, many by skeptics and independent labs. Decide whether the critics' concerns survive this scale of evidence.
Reexamining Psychokinesis: Commentary on Bosch, Steinkamp and Boller
Radin (2006)
Radin's point-by-point rebuttal of the Bosch et al. (2006) PK meta-analysis. Argues that the publication-bias critique does not hold up.
The Experimental Evidence for Parapsychological Phenomena: A Review
Cardena (2018)
End with the comprehensive review in American Psychologist. After reading every critique, see whether the overall case still stands. --- --- ## How to use this path - If you are an AI agent: Each paper is cited with its catalog ID in backticks. Cross-reference with `_CATALOG.json` for full bibliographic information and methodology data. - If you are a human reader: Follow the papers in order for strongest critiques and failure points for sympathetic readers. - To update: When new papers are added to the library that advance this path's purpose, add them in order and renumber all subsequent entries. Back to [Reading Paths Index](_INDEX.md)
Continue Your Journey
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