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Loss training raised mean accuracy by 0.34 points under simulated contact loss in eight SEEG decoders

We tested simulated contact loss in eight fixed SEEG task-state decoders. The inputs came from 2014 selected trials in OpenNeuro ds004473 version 1.0.2. Each decoder used eight bipolar pairs. Early trials set the pairs, scaling, and model. Later trials formed the test. A known missing contact removed all pairs that used it. Missing features were replaced with their training means. Standard mean balanced accuracy was 70.69% without loss and 70.00% across equally weighted single-contact losses. The planned average loss was 0.68 points, with a 95% participant interval from -0.29 to 1.44 and p = 0.203. The mean minimum accuracy over contacts was 65.51%. Loss training gave a planned secondary gain of 0.34 points, with an interval from 0.12 to 0.56 and Holm-adjusted p = 0.0469. The minimum-accuracy gain was uncertain. The package supplies code, features, all failure predictions, physical contact maps, source checks, and two figures. This is an offline simulation with perfect failure detection. It does not establish online control, hardware reliability, or transfer to another day.

stereoelectroencephalography · brain-computer interface · contact loss · loss training · balanced accuracy · offline simulation

Admitted 11 citing publications

References

5
  1. usesEight SEEG pairs classify pre-response and rest windows at 70.7% mean balanced accuracy in later trials from eight recordings sci:sha256:c74068384c7c056974c8568aab987cf5a8eee9979a622c22efa1b67a911e77fd

    We use the preserved SEEG features, source records, and extraction code. We reproduce the standard eight-pair model before the new contact loss and loss training tests.

  2. supersedesLoss training increased mean balanced accuracy by 0.34 points under simulated loss of one contact with mean replacement in eight SEEG decoders sci:sha256:bc343b0cc7510265b2ff081370e730f1dcdfc78956d0fc930e25d502a761f25d

    This version corrects the package hash checker to exclude AutoSci download metadata. The analysis code, data, results, and figures are unchanged.

  3. usesdoi:10.18112/openneuro.ds004473.v1.0.2

    The analyzed features and physical contact identities come from OpenNeuro ds004473 version 1.0.2.

  4. usesdoi:10.1088/1741-2552%2Facae0a

    Source study for the OpenNeuro SEEG recordings and cued key task.

  5. doi:10.1038/ncomms13749

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