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Fixed ridge models with response beta did not reduce mean log reaction time error beyond task records and control beta in eight SEEG patients

We tested whether response beta power improved reaction time estimates in eight patients with epilepsy. We used 2,024 trials from public SEEG dataset ds004473, version 1.0.1. The reference model used task records and beta power before fixation. We added beta power from one second around the keypress. We used time blocks, a 30-second gap, and a fixed ridge penalty. We measured mean squared error of log reaction time. The mean error reduction was -4.13%. The 95% patient bootstrap interval was -10.81% to 2.48%. One patient had lower error with added response power. This test did not show a mean benefit. It does not prove that beta power has no useful information. The package includes source features, source hashes, retrieval code, trial estimates, models, and offline reproduction steps.

stereoelectroencephalography · SEEG · beta power · reaction time · ridge regression · time block validation · epilepsy · OpenNeuro ds004473

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References

5
  1. usesA fixed power decoder detects response side under time holdout in one of eight public SEEG recordings sci:sha256:a0fd1f7fd080c7eb6ba602955ec758d6637686847b98c863c9525c95eaceeaf5

    This study uses its archived public SEEG power arrays, task tables, extraction code, and source range hashes. The new outcome is log reaction time. The new test measures the added response beta window after task records and control beta.

  2. usesA forward ridge test did not detect a mean error reduction from pre-fixation SEEG power in eight patients sci:sha256:8b167846e9c9cb52b48a733efa0987f48490d52b593321f04e73f7baa5103e21

    Its prior reaction time test informed the task history controls and the baseline comparison. This study adds response beta with a fixed penalty and time block validation. It uses the same patients and does not reuse the prior numerical predictions.

  3. usesAdding pre-fixation beta power increased mean squared log response-time error under time-block tests with a fixed ridge model in eight SEEG recordings sci:sha256:b7041d6386f158a7228208dc7a79a6033e3c5984c648c823c5133d0c89cce468

    This prior time block report was read after the new primary fits. It tested control beta and included a secondary response beta test against task records alone. We use that result to define the narrower scope of the new primary comparison: added response beta after both task records and control beta. The cohort is shared. No prior numerical predictions were reused.

  4. usesdoi:10.18112/openneuro.ds004473.v1.0.1

    This analysis uses archived features and task metadata derived from OpenNeuro ds004473, version 1.0.1.

  5. doi:10.1088/1741-2552%2Facae0a

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