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Data Structures with shared data
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Digit Symbol Substitution Test

3,325 Shared Subjects

Clinical Assessments
Task Based
View Change History
Query Element Name Data Type Size Required Description Value Range Notes Aliases
subjectkey GUID Required The NDAR Global Unique Identifier (GUID) for research subject NDAR*
src_subject_id String 20 Required Subject ID how it's defined in lab/project
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY studyday, v2_dsst_date
interview_age Integer Required Age in months at the time of the interview/test/sampling/imaging. 0 :: 1260 Age is rounded to chronological month. If the research participant is 15-days-old at time of interview, the appropriate value would be 0 months. If the participant is 16-days-old, the value would be 1 month. v10_dsst_age, v2_dsst_age, v4_dsst_age
sex String 20 Required Sex of subject at birth M;F; O; NR M = Male; F = Female; O=Other; NR = Not reported gender, sex
cpthtime String 20 Recommended Time tested HH:MM:SS
Query d2_tn Integer Recommended Total number of symbols processed, raw digit, v10_dsst_total_symbols, v2_dsst_total_symbols, v4_dsst_total_symbols
Query dsst_errors Integer Recommended Number of errors v10_dsst_errors, v2_dsst_errors, v4_dsst_errors
version_form String 121 Recommended Form used/assessment name digitsymbol_version
Query ncaid Integer Recommended Primary ID of Neurocognitive Test
site String 101 Recommended Site Study Site siteid
Query timept Integer Recommended Time Point 888 = not applicable; 999 = missing timepoint
testreason String 255 Recommended Reason for Testing digitsymbol_type
Query digitsymbol_symbol Integer Recommended Number of the Symbol Shown (1-9)
Query digitsymbol_digit Integer Recommended Which Digit Press for Correct Response (1-3)
Query digitsymbol_response Integer Recommended Digit Responded With (1-3)
Query responsecorrect Float Recommended Response Correct (1=Correct) 0 :: 1 0=Incorrect; 1=Correct digitsymbol_correct
Query rt Float Recommended Reaction Time digitsymbol_rt
crt_state String 25 Recommended Responded via Keyb/Touch/Mouse keyup=Keyboard; mouseup=Mouse (mouseup); pointerup=Mouse (pointerup); timeout=Timed Out; touchend=Touchscreen digitsymbol_state
Query battery_id Integer Recommended Identifier of Battery digitsymbol_batteryid
Query testid Integer Recommended Identifier of Current Test digitsymbol_testid
session_id String 20 Recommended session ID/screening ID digitsymbol_sittingid
Query cbgroup Integer Recommended Counterbalancing Group digitsymbol_group
Query aurora_device Integer Recommended Device Used 1 :: 6 1=iPad; 2=iPhone; 3=Tablet; 4=Android Smartphone; 5=Desktop; 6=Laptop digitsymbol_device
Query visit String 60 Recommended Visit name digitsymbol_timepoint
Query digitsymbol_num_correct Integer Recommended Number Of Correct Matches In 90 Seconds
Query digitsymbol_num_responses Integer Recommended Number Of Total Responses In 90 Seconds digsym.dscor
Query digitsymbol_meanrtc Float Recommended Mean Reaction Time For All Correct Trials (ms)
Query digitsymbol_medianrtc Float Recommended Median Reaction Time For All Correct Trials (ms) digsym.dscorrt
Query digitsymbol_sdrtc Float Recommended Standard Deviation Of Reaction Times Across All Correct Trials (ms)
deviceserialnumber String 200 Recommended device serial number/ID digitsymbol_useragent
Query testduration Float Recommended Seconds Taken To Complete Test digitsymbol_duration
Query testrestarts Integer Recommended Number Of Times Participant Restarted Test digitsymbol_reloaded
Query mpdat Float Recommended days from enrollment studyday
Data Structure

This page displays the data structure defined for the measure identified in the title and structure short name. The table below displays a list of data elements in this structure (also called variables) and the following information:

  • Element Name: This is the standard element name
  • Data Type: Which type of data this element is, e.g. String, Float, File location.
  • Size: If applicable, the character limit of this element
  • Required: This column displays whether the element is Required for valid submissions, Recommended for valid submissions, Conditional on other elements, or Optional
  • Description: A basic description
  • Value Range: Which values can appear validly in this element (case sensitive for strings)
  • Notes: Expanded description or notes on coding of values
  • Aliases: A list of currently supported Aliases (alternate element names)
  • For valid elements with shared data, on the far left is a Filter button you can use to view a summary of shared data for that element and apply a query filter to your Cart based on selected value ranges

At the top of this page you can also:

  • Use the search bar to filter the elements displayed. This will not filter on the Size of Required columns
  • Download a copy of this definition in CSV format
  • Download a blank CSV submission template prepopulated with the correct structure header rows ready to fill with subject records and upload

Please email the The NDA Help Desk with any questions.