Fixed heat scores decreased with retained order in 115 EEG and 20 fMRI adults; resampling training subjects left the fMRI slope uncertain

We tested order effects on scores fitted to physical heat labels in separate public human EEG and fMRI studies. Development used 39 EEG adults and eight MRI adults. A local code and reader lock preceded tests in 115 other EEG adults and 20 other MRI adults. After input-cell controls and MRI context factors, mean score changes over retained trial order were -0.572 and -0.283 within-person SD. Their 95% person Student intervals were [-0.679,-0.464] and [-0.553,-0.013]. The shared negative test passed Holm correction over two claims, p=0.04065. The shared prediction that scores decrease more than reports failed, p=0.99987. Score-minus-report means were +0.321 and -0.420. Reader-and-test-person resampling gave score intervals [-0.683, -0.452] and [-0.518, +0.026], with alpha fixed. The MRI score interval now included zero. A shared decrease robust to training subjects was not established. The 24 mm MRI interval also included zero. The group EEG decrease repeated at a second visit, but personal trend agreement was uncertain. All negative people and failed checks remain. Different cohorts, heat methods, selected trials, incomplete timing, source processing and vascular effects limit scope. The shared positive result is conditional on the fixed readers. It concerns an order-related measurement effect. These results do not identify a shared neural cause or a causal effect of repetition. The package gives code, permitted compact data, source pins and terms, plans, every person result, uncertainty draws, figures and repeat steps.

pain · adaptation · EEG · fMRI · trial order · cross-modal test · subject holdout · reader uncertainty