{
  "id": 52096,
  "title": "Should false negatives (FN) be true negatives (TN)?",
  "url": "/competitions/data-science-bowl-2018/discussion/52096",
  "author_name": "",
  "post_date": "2018-03-15T21:38:39.006669600Z",
  "votes": null,
  "comment_count": 1,
  "views": 0,
  "content": "<p>Hi, all:</p>\n\n<p>Just wonder if this is incorrect? On this page:\n[https://www.kaggle.com/c/data-science-bowl-2018#evaluation][1]</p>\n\n<blockquote>\n  <p>A false negative indicates a ground truth object had no associated\n  predicted object.</p>\n</blockquote>\n\n<p>Normally, we say <strong>a ground truth object had no associated predicted object</strong> is a <strong>True Negative</strong> ??</p>\n\n<p>Correct me if I'm wrong...</p>\n\n<p>Cheers\nPei</p>",
  "messages": [
    {
      "id": "296863",
      "postDate": "03/15/2018 21:38:39",
      "content": "<p>Hi, all:</p>\n\n<p>Just wonder if this is incorrect? On this page:\n[https://www.kaggle.com/c/data-science-bowl-2018#evaluation][1]</p>\n\n<blockquote>\n  <p>A false negative indicates a ground truth object had no associated\n  predicted object.</p>\n</blockquote>\n\n<p>Normally, we say <strong>a ground truth object had no associated predicted object</strong> is a <strong>True Negative</strong> ??</p>\n\n<p>Correct me if I'm wrong...</p>\n\n<p>Cheers\nPei</p>",
      "rawMarkdown": "Hi, all:\n\nJust wonder if this is incorrect? On this page:\n[https://www.kaggle.com/c/data-science-bowl-2018#evaluation][1]\n\n&gt; A false negative indicates a ground truth object had no associated\n&gt; predicted object.\n\nNormally, we say **a ground truth object had no associated predicted object** is a **True Negative** ??\n\nCorrect me if I'm wrong...\n\n\nCheers\nPei",
      "votes": null
    },
    {
      "id": "296873",
      "postDate": "03/15/2018 22:00:43",
      "content": "<p>If we define a positive event to be the detection of an object when an object is in fact present:</p>\n\n<ol>\n<li><p>False Negative: An object is not detected when there is an object.</p></li>\n<li><p>False Positive:  An object is detected when there isn't an object.</p></li>\n<li><p>True Positive: An object is detected where there is an object.</p></li>\n<li><p>True Negative: An object is not detected where there is not an object. </p></li>\n</ol>\n\n<p>I think the source is correct. A True Negative for this problem would happen when there is no ground truth object and we predict no associated object as well.</p>",
      "rawMarkdown": "If we define a positive event to be the detection of an object when an object is in fact present:\n\n1. False Negative: An object is not detected when there is an object.\n\n2. False Positive:  An object is detected when there isn't an object.\n\n3. True Positive: An object is detected where there is an object.\n\n4. True Negative: An object is not detected where there is not an object. \n\nI think the source is correct. A True Negative for this problem would happen when there is no ground truth object and we predict no associated object as well.",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 296873,
      "author_name": "pliptor",
      "author_url": "",
      "post_date": "03/15/2018 22:00:43",
      "content": "<p>If we define a positive event to be the detection of an object when an object is in fact present:</p>\n\n<ol>\n<li><p>False Negative: An object is not detected when there is an object.</p></li>\n<li><p>False Positive:  An object is detected when there isn't an object.</p></li>\n<li><p>True Positive: An object is detected where there is an object.</p></li>\n<li><p>True Negative: An object is not detected where there is not an object. </p></li>\n</ol>\n\n<p>I think the source is correct. A True Negative for this problem would happen when there is no ground truth object and we predict no associated object as well.</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "296863": "Hi, all:\n\nJust wonder if this is incorrect? On this page:\n[https://www.kaggle.com/c/data-science-bowl-2018#evaluation][1]\n\n&gt; A false negative indicates a ground truth object had no associated\n&gt; predicted object.\n\nNormally, we say **a ground truth object had no associated predicted object** is a **True Negative** ??\n\nCorrect me if I'm wrong...\n\n\nCheers\nPei",
    "296873": "If we define a positive event to be the detection of an object when an object is in fact present:\n\n1. False Negative: An object is not detected when there is an object.\n\n2. False Positive:  An object is detected when there isn't an object.\n\n3. True Positive: An object is detected where there is an object.\n\n4. True Negative: An object is not detected where there is not an object. \n\nI think the source is correct. A True Negative for this problem would happen when there is no ground truth object and we predict no associated object as well."
  },
  "source": "meta"
}