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Martin Meyer

@m-meyer.bsky.social

A psychology graduate student studying belief systems

Martin Meyer @m-meyer.bsky.social · 26/06/2026

These findings have implications for mechanisms of delusion maintenance. Increased learning of positive evidence/decreased learning of contrary evidence might make beliefs harder to falsify. To read more, see: osf.io/preprints/ps... 3/3

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Martin Meyer @m-meyer.bsky.social · 26/06/2026

Computational modelling clarifies that the over-generalization of learned causes has to do with distress from delusions broadly, whereas under-generalization of learned absences may have more to do with the experience of reference delusions (as is commensurate with the latter's limited scope). 2/3

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Martin Meyer @m-meyer.bsky.social · 26/06/2026

In a paper just accepted at Schizophrenia Bulletin, @philcorlett.bsky.social and I, along with coauthors, explore the relationship between generalization and delusions. We find an asymmetry: delusionality tracks either over-generalizing causes or under-generalizing their absence. 1/3

This is a diagram of the effect of delusionality on peak shift behaviors. For people with high delusionality, regions that could potentially elicit a positive response are more likely to, and regions that could potentially elicit a negative response are less likely to.

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Martin Meyer @m-meyer.bsky.social · 26/12/2025

Here's the paper if you don't have access to Cognition and are interested: osf.io/preprints/ps... Following the link will also give you access to the data, code, surveys, etc. 3/

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Martin Meyer @m-meyer.bsky.social · 26/12/2025

A little side note: we found no evidence that identity expression and representing facts were anything but unimodally distributed. You might think beliefs either represent facts or don't. But, at least in this study, many occupied an intermediate space. 2/

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Martin Meyer @m-meyer.bsky.social · 26/12/2025

@xphilosopher.bsky.social and I tried to study what beliefs do (or at least, what people think they do). Across hundreds of participant generated beliefs and first/third party ratings, we found they express identity and/or represent facts, in the pattern described in this post. 1/

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Martin Meyer @m-meyer.bsky.social · 26/12/2025

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Martin Meyer @m-meyer.bsky.social · 26/12/2025

Since participants only rated one belief it was quick -- 8 evidence scales, 2-4 minutes. In all honesty, we were surprised to see a robust two-factor solution. We had wondered whether the items might all load on the same factor!

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Martin Meyer @m-meyer.bsky.social · 30/11/2024

Recently investigated what it means for a belief to represent identity with @xphilosopher.bsky.social. It's seemingly unrelated to whether the belief is subjective! See where beliefs landed on identity (symbolic) and subjectivity: plotly.com/~m.meyer/6/ Here's the paper: osf.io/preprints/ps...

plotly.com

Individual Responses Organized by Factor Scores | scatter chart made by M.meyer | plotly

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