Thread by @RoseboomWarrick

Interested in rubber hand illusion and #embodiment? We’ve been looking at how subjective measures of ownership in RHI are confounded by suggestion effects. New pre-print on psyArXiv! (1/6) psyarxiv.com/uhdzs

Checkout #raincloudplot (petit prince plots?) in Fig. 4 – subjective ownership ratings strongly depend on whether participants are higher or lower in trait phenomenological control @micahgallen (2/6)

We ran several simulations of RHI experiments using a previously published large dataset and manipulated how many participants in a given experiment sample were above or below median trait phenom. control (3/6)

Experiments w/ only participants higher in trait phenom. control are almost guaranteed to conclude evidence in favour of RHI. By contrast, experiments with only those lower in trait phenom. control conclude if favour of RHI only ~50% of the time (4/6)

We conclude that the confounding of RHI by trait phenom. control undermines strong statements of body ownership based on RHI paradigms – finding evidence for RHI in a given experiment depends on the number of higher phenom. control participants in your sample (5/6)

This finding is particularly problematic for experiments that exclude participants based on whether they ‘experience’ RHI or not and poses serious issues for considering the existing literature as reflective of the general nature of sense of body ownership (6/6)

Analysis code and data at osf.io/d5hjp/ #openscience