"stimulus delta" meaning in English

{
  "forms": [
    {
      "form": "stimulus deltas",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "stimulus delta (plural stimulus deltas)",
      "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": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Psychology",
          "orig": "en:Psychology",
          "parents": [
            "Social sciences",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "discriminative stimulus"
        }
      ],
      "glosses": [
        "A stimulus that does not reinforce an existing behavior in a subject and causes the subject to employ a new behavior."
      ],
      "id": "en-stimulus_delta-en-noun-HnWYVjqr",
      "links": [
        [
          "psychology",
          "psychology"
        ]
      ],
      "qualifier": "behavioral psychology",
      "raw_glosses": [
        "(behavioral psychology) A stimulus that does not reinforce an existing behavior in a subject and causes the subject to employ a new behavior."
      ],
      "synonyms": [
        {
          "word": "S-delta"
        },
        {
          "word": "S-δ"
        }
      ]
    }
  ],
  "word": "stimulus delta"
}

{
  "coordinate_terms": [
    {
      "word": "discriminative stimulus"
    }
  ],
  "forms": [
    {
      "form": "stimulus deltas",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "stimulus delta (plural stimulus deltas)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Psychology"
      ],
      "glosses": [
        "A stimulus that does not reinforce an existing behavior in a subject and causes the subject to employ a new behavior."
      ],
      "links": [
        [
          "psychology",
          "psychology"
        ]
      ],
      "qualifier": "behavioral psychology",
      "raw_glosses": [
        "(behavioral psychology) A stimulus that does not reinforce an existing behavior in a subject and causes the subject to employ a new behavior."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "S-delta"
    },
    {
      "word": "S-δ"
    }
  ],
  "word": "stimulus delta"
}