{
  "id": 145766,
  "title": "Why kappa !",
  "url": "/competitions/prostate-cancer-grade-assessment/discussion/145766",
  "author_name": "Yaheaal",
  "post_date": "2020-04-24T12:49:21.429000",
  "votes": 0,
  "comment_count": 2,
  "views": 0,
  "content": "<p>I think it's really important question WHY KAPPA !!!\nHow can some one decide which is the best metrics for a problem , for example why not to use F1 here, or recall with minimum precision .7 .8 .9 etc....</p>",
  "messages": [
    {
      "id": 819849,
      "postDate": "2020-04-24T23:44:35.403Z",
      "content": "<p>Kappa has been used in many related works on the topic and seems to be the standard for comparing inter-observer agreement between pathologists. So it makes sense to me that we would use Kappa to compare against the existing literature.</p>\n\n<p>Of course there is never going to be an ideal metric, and they could have used one of the metrics you mentioned, but what would be the point? Is there a clear advantage these metrics have over Kappa?</p>",
      "rawMarkdown": "Kappa has been used in many related works on the topic and seems to be the standard for comparing inter-observer agreement between pathologists. So it makes sense to me that we would use Kappa to compare against the existing literature.\n\nOf course there is never going to be an ideal metric, and they could have used one of the metrics you mentioned, but what would be the point? Is there a clear advantage these metrics have over Kappa?",
      "votes": 3,
      "replies": [
        {
          "id": 823164,
          "postDate": "2020-04-27T13:12:44.580Z",
          "content": "<p>Thanks, my point is why ?\nfor example let's say I have a company and I want to work on a problem , how can I decided which matrix I will use :)</p>",
          "rawMarkdown": "Thanks, my point is why ?\nfor example let's say I have a company and I want to work on a problem , how can I decided which matrix I will use :)"
        }
      ]
    },
    {
      "id": 819238,
      "postDate": "2020-04-24T12:49:21.430Z",
      "content": "<p>I think it's really important question WHY KAPPA !!!\nHow can some one decide which is the best metrics for a problem , for example why not to use F1 here, or recall with minimum precision .7 .8 .9 etc....</p>",
      "rawMarkdown": "I think it's really important question WHY KAPPA !!!\nHow can some one decide which is the best metrics for a problem , for example why not to use F1 here, or recall with minimum precision .7 .8 .9 etc....\n"
    }
  ],
  "comments": [
    {
      "id": 819849,
      "author_name": "Matt",
      "author_url": "",
      "post_date": "2020-04-24T23:44:35.403000",
      "content": "<p>Kappa has been used in many related works on the topic and seems to be the standard for comparing inter-observer agreement between pathologists. So it makes sense to me that we would use Kappa to compare against the existing literature.</p>\n\n<p>Of course there is never going to be an ideal metric, and they could have used one of the metrics you mentioned, but what would be the point? Is there a clear advantage these metrics have over Kappa?</p>",
      "votes": 3,
      "replies": [
        {
          "id": 823164,
          "author_name": "Yaheaal",
          "author_url": "",
          "post_date": "2020-04-27T13:12:44.580000",
          "content": "<p>Thanks, my point is why ?\nfor example let's say I have a company and I want to work on a problem , how can I decided which matrix I will use :)</p>",
          "votes": 0,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "819849": "Kappa has been used in many related works on the topic and seems to be the standard for comparing inter-observer agreement between pathologists. So it makes sense to me that we would use Kappa to compare against the existing literature.\n\nOf course there is never going to be an ideal metric, and they could have used one of the metrics you mentioned, but what would be the point? Is there a clear advantage these metrics have over Kappa?",
    "819238": "I think it's really important question WHY KAPPA !!!\nHow can some one decide which is the best metrics for a problem , for example why not to use F1 here, or recall with minimum precision .7 .8 .9 etc....\n"
  }
}