{"id_concept_class": "", "creation_time": 1512660586114, "event_stamp": "2009-07-10T21:01:20", "def_id_user": "usr_579611e01221d", "def_event_stamp": "2016-07-25T17:08:42", "last_updated": 1512660586114, "def_id": "def_57964799e603c", "name": "symbol-digit substitution", "alias": "digit symbol substitution task, DSST", "definition_text": "DSST is a neuropsychological test sensitive to brain damage, dementia, age and depression. It isn\u00e2\u0080\u0099t sensitive to the location of brain-damage (except for damage comprising part of the visual field). It consists of (e.g. nine) digit-symbol pairs (e.g. 1/-,2/\u00e2\u0094\u00b4 ... 7/\u00ce\u009b,8/X,9/=) followed by a list of digits. Under each digit the subject should write down the corresponding symbol as fast as possible. The number of correct symbols within the allowed time (e.g. 90 or 120 sec) is measured.\r\n", "id_user": "usr_0000000000", "id": "tsk_4a57abb949e44", "type": "task", "conditions": [], "concepts": [], "indicators": [{"type": "response time", "relationship": "HASINDICATOR"}, {"type": "accuracy", "relationship": "HASINDICATOR"}], "external_datasets": [], "implementations": [{"creation_time": 1528249104713, "implementation_name": "Cognition Lab - SDS", "last_updated": 1528249104713, "implementation_description": "Configurable web-based test paradigm with 9:9 of 8:4 stimulus to key mapping", "name": "Cognition Lab - SDS", "id": "imp_UIXCjHxd79Ctl", "implementation_uri": "https://cognitionlab.com/portfolio/digit-symbol-substitution/gallery/library/", "relationship": "HASIMPLEMENTATION"}, {"event_stamp": "2016-07-25T17:15:36", "implementation_name": "Implementation Name Placeholder", "implementation_description": "The DSST was used in the ADNI 1 Cognitive Assessments, which can be downloaded from the link.", "id_task": "tsk_4a57abb949e44", "id_user": "usr_579611e01221d", "id": "imp_579649381985f", "implementation_uri": "http://www.adni-info.org/Scientists/WorksheetPackets.html", "relationship": "HASIMPLEMENTATION"}], "citation": [{"event_stamp": "2011-06-17T22:24:56", "citation_pubname": "Schizophrenia research (Schizophr Res)", "citation_pmid": "21147521", "citation_desc": "What can eye movements tell us about Symbol Digit substitution by patients with schizophrenia?", "citation_url": "http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=21147521&retmode=ref&cmd=prlinks", "citation_type": "CT2", "citation_comment": "Via PubMed API", "id_user": "usr_4de5345b3b6a8", "id": "cit_4dfbd438bf052", "citation_source": "PubMed API", "citation_authors": "Elahipanah A, Christensen BK, Reingold EM", "citation_pubdate": "2011 Apr", "relationship": "HASCITATION"}], "contrasts": [{"creation_time": 1512660655838, "event_stamp": "2011-06-17T22:34:00", "last_updated": 1512660655838, "name": "substitution speed minus copy speed", "id_user": "usr_4de5345b3b6a8", "id": "cnt_4dfbd65810a40", "conditions": []}], "batteries": [{"creation_time": 1512660840024, "event_stamp": "2016-07-25T17:59:04", "website": "http://www.adni-info.org/", "last_updated": 1512660840024, "collection_alias": "ADNI 1", "name": "Alzheimer's Disease Neuroimaging Initiative 1", "collection_date_introduced": "Oct 2004", "collection_publisher": "ADNI", "id_user": "usr_579611e01221d", "collection_description": "<p>Three overarching ADNI goals are:</p><br /><p>- To detect Alzheimer\u00e2\u0080\u0099s disease (AD) at the earliest stage possible and identify ways to track the disease through biomarkers.</br><br />- To support advances in AD intervention, prevention and treatment through the application of new diagnostic methods to apply at the earliest stages technically possible - when intervention may be most effective.<br /><br>- To continually develop ADNI\u00e2\u0080\u0099s now- legendary data access policy and continuously improve and expand the unprecedented data sharing model.</p><br /><p>ADNI began in October 2004 and was designed to find more sensitive and accurate methods to detect Alzheimer\u00e2\u0080\u0099s disease at earlier stages and mark its progress through biomarkers. The study gathered and analyzed thousands of brain scans, genetic profiles, and biomarkers in blood and cerebrospinal fluid that are used to measure the progress of disease or the effects of treatment.</p>", "id": "tco_57965368237ec", "flag_for_curator": 1, "relationship": "INBATTERY"}], "disorders": []}