{
  "id": 614669,
  "title": "Question about Z-score",
  "url": "/competitions/brain-to-text-25/discussion/614669",
  "author_name": "",
  "post_date": "2025-11-05T15:02:37.454956300Z",
  "votes": null,
  "comment_count": 1,
  "views": 0,
  "content": "<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F29869725%2F2e2a153d145b49f8797f7c1609336b2d%2FZsocre.png?generation=1762354579954360&amp;alt=media\" alt=\"\">\nThe appendix mentions that neural features are z-scored using their means and standard deviations from the speech epochs of the previous 20 trials. What does speech epoch refer to here? (block?) Is the Z-score operation in the code provided?</p>",
  "messages": [
    {
      "id": "3311682",
      "postDate": "11/05/2025 15:02:37",
      "content": "<p><img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F29869725%2F2e2a153d145b49f8797f7c1609336b2d%2FZsocre.png?generation=1762354579954360&amp;alt=media\" alt=\"\">\nThe appendix mentions that neural features are z-scored using their means and standard deviations from the speech epochs of the previous 20 trials. What does speech epoch refer to here? (block?) Is the Z-score operation in the code provided?</p>",
      "rawMarkdown": "![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F29869725%2F2e2a153d145b49f8797f7c1609336b2d%2FZsocre.png?generation=1762354579954360&alt=media)\nThe appendix mentions that neural features are z-scored using their means and standard deviations from the speech epochs of the previous 20 trials. What does speech epoch refer to here? (block?) Is the Z-score operation in the code provided?",
      "votes": null
    },
    {
      "id": "3311772",
      "postDate": "11/05/2025 18:32:50",
      "content": "<p>\"Speech epoch\" means the time from the start of a trial's GO epoch until the trial end. That is, the time while the participant is speaking. The data provided in this competition is pre-z-scored.</p>",
      "rawMarkdown": "\"Speech epoch\" means the time from the start of a trial's GO epoch until the trial end. That is, the time while the participant is speaking. The data provided in this competition is pre-z-scored.",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 3311772,
      "author_name": "notnickc",
      "author_url": "",
      "post_date": "11/05/2025 18:32:50",
      "content": "<p>\"Speech epoch\" means the time from the start of a trial's GO epoch until the trial end. That is, the time while the participant is speaking. The data provided in this competition is pre-z-scored.</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "3311682": "![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F29869725%2F2e2a153d145b49f8797f7c1609336b2d%2FZsocre.png?generation=1762354579954360&alt=media)\nThe appendix mentions that neural features are z-scored using their means and standard deviations from the speech epochs of the previous 20 trials. What does speech epoch refer to here? (block?) Is the Z-score operation in the code provided?",
    "3311772": "\"Speech epoch\" means the time from the start of a trial's GO epoch until the trial end. That is, the time while the participant is speaking. The data provided in this competition is pre-z-scored."
  },
  "source": "meta"
}