{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Symbol+Span",
    "query": {
      "intervention": "Symbol Span"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 5,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-11T17:31:21.138Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT03502603",
      "title": "Pilot Study of New Computer-based Neuropsychological Tool: Visual Tests, Touch Responses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cerebral Neurological Illness"
      ],
      "interventions": [
        {
          "name": "Railroad Test",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Swamp Test",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Presidents Recognition Test",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Judgment of Line Orientation",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Symbol Span subtest of the Wechsler Memory Scale-IV",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Information subtest of the Wechsler Adult Intelligence Scale-IV:",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Digit Span subtest of the Wechsler Adult Intelligence Scale-I",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Reading subtest of the Wide Range Achievement Test",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Symbol Digit Modalities Test:",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Dot Counting Test",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 137,
      "start_date": "2019-05-10",
      "completion_date": "2023-12-06",
      "has_results": false,
      "last_update_posted_date": "2025-04-09",
      "last_synced_at": "2026-09-11T17:31:21.138Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03502603"
    },
    {
      "nct_id": "NCT03127709",
      "title": "A Study of Memory, Thinking, and Brain Imaging in Adults With Histiocytosis",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Histiocytosis"
      ],
      "interventions": [
        {
          "name": "Trail Making Test, Parts A & B",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Brief Test of Attention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Symbol Span",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Controlled Oral Word Association Test",
          "type": "BEHAVIORAL"
        },
        {
          "name": "The Hopkins Verbal Learning Test-Revised",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Brief Visuospatial Memory Test-Revised",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Hospital Anxiety and Depression Scale",
          "type": "BEHAVIORAL"
        },
        {
          "name": "McGill Quality of Life Scale",
          "type": "BEHAVIORAL"
        },
        {
          "name": "MR Brain Imaging",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Resting state functional MRI",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Functional Assessment of Cancer Therapy Cognitive Scale (FACT-Cog)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 13,
      "start_date": "2017-04-07",
      "completion_date": "2027-04",
      "has_results": false,
      "last_update_posted_date": "2026-05-07",
      "last_synced_at": "2026-09-11T17:31:21.138Z",
      "location_count": 4,
      "location_summary": "Basking Ridge, New Jersey • Middletown, New Jersey • Commack, New York + 1 more",
      "locations": [
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        },
        {
          "city": "Middletown",
          "state": "New Jersey"
        },
        {
          "city": "Commack",
          "state": "New York"
        },
        {
          "city": "Harrison",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03127709"
    },
    {
      "nct_id": "NCT03678324",
      "title": "Pre-Clinical White Matter Changes and Associated Connectivity Effects in Fabry Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Fabry Disease"
      ],
      "interventions": [
        {
          "name": "Functional MRI and fast bound-pool fraction imaging",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 40,
      "start_date": "2020-01-27",
      "completion_date": "2022-03-30",
      "has_results": false,
      "last_update_posted_date": "2022-05-26",
      "last_synced_at": "2026-09-11T17:31:21.138Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03678324"
    },
    {
      "nct_id": "NCT05480904",
      "title": "Characterizing Sleep Among Long-term Survivors of Childhood Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "ALL, Adult",
        "CNS Tumor",
        "Solid Tumor"
      ],
      "interventions": [
        {
          "name": "Neurocognitive (Thinking) Testing",
          "type": "OTHER"
        },
        {
          "name": "CNS Vital Signs (Thinking) Testing",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Health Questionnaires, Sleep Surveys & Sleep Diary",
          "type": "OTHER"
        },
        {
          "name": "Echocardiography/EKG",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Pulmonary Function",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Remote Polysomnography",
          "type": "DEVICE"
        },
        {
          "name": "Physical Function",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DIAGNOSTIC_TEST",
        "DEVICE"
      ],
      "sponsor": "St. Jude Children's Research Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 199,
      "start_date": "2023-04-17",
      "completion_date": "2027-01",
      "has_results": false,
      "last_update_posted_date": "2026-08-19",
      "last_synced_at": "2026-09-11T17:31:21.138Z",
      "location_count": 1,
      "location_summary": "Memphis, Tennessee",
      "locations": [
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05480904"
    },
    {
      "nct_id": "NCT05207098",
      "title": "A Study of Neurocognitive Tests and Questionnaires for People With Head and Neck Cancer Who Are Undergoing Radiation Therapy",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Head and Neck Cancer"
      ],
      "interventions": [
        {
          "name": "Neurocognitive Tests",
          "type": "OTHER"
        },
        {
          "name": "Questionnaires",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 60,
      "start_date": "2021-12-22",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-06-05",
      "last_synced_at": "2026-09-11T17:31:21.138Z",
      "location_count": 7,
      "location_summary": "Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more",
      "locations": [
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        },
        {
          "city": "Middletown",
          "state": "New Jersey"
        },
        {
          "city": "Montvale",
          "state": "New Jersey"
        },
        {
          "city": "Commack",
          "state": "New York"
        },
        {
          "city": "Harrison",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05207098"
    }
  ]
}