"double-blind test" meaning in English

{
  "forms": [
    {
      "form": "double-blind tests",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "double-blind test (plural double-blind tests)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sciences",
          "orig": "en:Sciences",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A form of scientific testing in which some information is withheld from two different parties. Most commonly, neither the tester nor the subjects tested know which are the control items and which are the test items."
      ],
      "id": "en-double-blind_test-en-noun-zOAxvY8H",
      "links": [
        [
          "sciences",
          "sciences"
        ],
        [
          "scientific",
          "scientific"
        ],
        [
          "testing",
          "testing"
        ],
        [
          "tester",
          "tester"
        ],
        [
          "control",
          "control"
        ],
        [
          "test",
          "test"
        ]
      ],
      "raw_glosses": [
        "(sciences) A form of scientific testing in which some information is withheld from two different parties. Most commonly, neither the tester nor the subjects tested know which are the control items and which are the test items."
      ],
      "related": [
        {
          "word": "test double"
        }
      ],
      "topics": [
        "sciences"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "form of scientific testing",
          "word": "雙盲實驗"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "shuāngmáng shíyàn",
          "sense": "form of scientific testing",
          "word": "双盲实验"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "form of scientific testing",
          "word": "kaksoissokkotesti"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "form of scientific testing",
          "tags": [
            "feminine"
          ],
          "word": "étude en double aveugle"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "form of scientific testing",
          "word": "podwójnie ślepa próba"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "dvojnój slepój métod",
          "sense": "form of scientific testing",
          "tags": [
            "masculine"
          ],
          "word": "двойно́й слепо́й ме́тод"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "form of scientific testing",
          "tags": [
            "masculine"
          ],
          "word": "experimento a doble ciego"
        }
      ],
      "wikipedia": [
        "double-blind test"
      ]
    }
  ],
  "word": "double-blind test"
}

{
  "forms": [
    {
      "form": "double-blind tests",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "double-blind test (plural double-blind tests)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "test double"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Sciences"
      ],
      "glosses": [
        "A form of scientific testing in which some information is withheld from two different parties. Most commonly, neither the tester nor the subjects tested know which are the control items and which are the test items."
      ],
      "links": [
        [
          "sciences",
          "sciences"
        ],
        [
          "scientific",
          "scientific"
        ],
        [
          "testing",
          "testing"
        ],
        [
          "tester",
          "tester"
        ],
        [
          "control",
          "control"
        ],
        [
          "test",
          "test"
        ]
      ],
      "raw_glosses": [
        "(sciences) A form of scientific testing in which some information is withheld from two different parties. Most commonly, neither the tester nor the subjects tested know which are the control items and which are the test items."
      ],
      "topics": [
        "sciences"
      ],
      "wikipedia": [
        "double-blind test"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "form of scientific testing",
      "word": "雙盲實驗"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "shuāngmáng shíyàn",
      "sense": "form of scientific testing",
      "word": "双盲实验"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "form of scientific testing",
      "word": "kaksoissokkotesti"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "form of scientific testing",
      "tags": [
        "feminine"
      ],
      "word": "étude en double aveugle"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "form of scientific testing",
      "word": "podwójnie ślepa próba"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "dvojnój slepój métod",
      "sense": "form of scientific testing",
      "tags": [
        "masculine"
      ],
      "word": "двойно́й слепо́й ме́тод"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "form of scientific testing",
      "tags": [
        "masculine"
      ],
      "word": "experimento a doble ciego"
    }
  ],
  "word": "double-blind test"
}