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Frequently Asked Questions


NDA Help Center

Filter Cart

The Filter Cart provides a powerful way to query and access data for which you may be interested.  

A few points related to the filter cart are important to understand with the NDA Query/Filter implementation: 

First, the filter cart is populated asyncronously.  So, when you run a query, it may take a moment to populate but this will happen in the background so you can define other queries during this time.  

When you are adding your first filter, all data associated with your query will be added to the filter cart (whether it be a collection, a concept, a study, a data structure/elment or subjects). Not all data structures or collections will necessarily be displayed.  For example, if you select the NDA imaging structure image03, and further restrict that query to scan_type fMRI, only fMRI images will appear and only the image03 structure will be shown.  To see other data structures, select "Find All Subject Data" which will query all data for those subjects. When a secord or third filter is applied, an AND condition is used.  A subject must exist in all filters.  If the subject does not appear in any one filter, that subjects data will not be included in your filter cart. If that happens, clear your filter cart, and start over.  

It is best to package more data than you need and access those data using other tools, independent of the NDA (e.g. miNDAR snapshot), to limit the data selected.  If you have any questions on data access, are interested in using avaialble web services, or need help accessing data, please contact us for assistance.  

Frequently Asked Questions



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Dot Probe Task



Download Definition as
Download Submission Template as
Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*
src_subject_idString20RequiredSubject ID how it's defined in lab/projectsubject_id
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired fieldsession_date, studyday
interview_ageIntegerRequiredAge in months at the time of the interview/test/sampling/imaging.0 :: 1260Age 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.
sexString20RequiredSex of the subjectM;FM = Male; F = Femalegender, sex
acc_nocongFloatRecommendedAccuracy for trials in which the probe appears behind the neutral facemillisecondsaccuracy_neutral, dotprobe_cond1correct
acc_congFloatRecommendedAccuracy for trials in which the emotion word matches the facial expressionmillisecondsaccuracy_threat
rt_nocongFloatRecommendedReaction time for trials in which the probe appears behind the neutral facemilliseconds
rt_congFloatRecommendedReaction time for trials in which the emotion word matches the facial expressionmilliseconds
rt_nocong_corrFloatRecommendedReaction time for trials in which the probe appears behind the neutral face, only for trials in which the participant responded correctlymillisecondsrt_neutral_nt
rt_cong_corrFloatRecommendedReaction time for trials in which the probe appears behind the angry face, only for trials in which the participant responded correctlymillisecondsrt_threat_nt
data_file1FileRecommendedData file 1
experiment_descriptionString4,000RecommendedDescription of experiment/sequence/event
timentrlFloatRecommendedReaction time for neutral trialsmsec
accuracy_allFloatRecommendedAccuracy across all trialsmilliseconds
accuracy_ntFloatRecommendedAccuracy for neutral-threat trials onlymilliseconds
accuracy_nnFloatRecommendedAccuracy for neutral-neutral trials onlymilliseconds
rt_allFloatRecommendedReaction time for all trialsmilliseconds
rt_ntFloatRecommendedReaction time for neutral-threat trials onlymilliseconds
rt_nnFloatRecommendedReaction time for neutral-neutral trials onlymilliseconds
threat_biasFloatRecommended(rt_nocong_corr - rt_cong_corr)milliseconds
session_idString20Recommendedsession ID/screening IDdotprobe_sittingid, session
stimeString20RecommendedSession timesession_time
trtnameString10RecommendedTreatment groupM;C;P; A; P; LM=Medication only; C=Combined medication and psychosocial; P=Psychosocial only; A = Assessment and Referral; L = LNCG (Local Normative Comparison Group)group
ncaidIntegerRecommendedPrimary ID of Neurocognitive Test
siteString101RecommendedSiteStudy Sitesiteid
timeptIntegerRecommendedTime Point888 = not applicable; 999 = missingtimepoint
dotprobe_conditionIntegerRecommendedWhether Dot Behind Threat or Neutral Face1 :: 3; -1-1=Practice; 1=Behind Threat Face; 2=Behind Neutral Face; 3=Behind Neutral Face (Neutral Pair); -1=Practice
dotprobe_topimgString50RecommendedFilename of Image Displayed on Top
dotprobe_bottomimgString50RecommendedFilename of Image Displayed on Bottom
dotprobe_topemoString7RecommendedEmotion Top Image Displays
dotprobe_bottomemoString7RecommendedEmotion Bottom Image Displays
dotprobe_probeString5RecommendedDirection Partipant Instructed To Press
dotprobe_probelocString6RecommendedWhether Probe Behind Top/Bottom Image
responsecorrectFloatRecommendedResponse Correct (1=Correct)0 :: 10=Incorrect; 1=Correctdotprobe_correct
rtFloatRecommendedReaction Timedotprobe_rt
crt_stateString9RecommendedResponded via Keyb/Touch/Mousekeyup=Keyboard; mouseup=Mouse (mouseup); pointerup=Mouse (pointerup); timeout=Timed Out; touchend=Touchscreendotprobe_state
battery_idIntegerRecommendedIdentifier of Batterydotprobe_batteryid
testidIntegerRecommendedIdentifier of Current Testdotprobe_testid
cbgroupIntegerRecommendedCounterbalancing Groupdotprobe_group
version_formString100RecommendedForm used/assessment namedotprobe_version
aurora_deviceIntegerRecommendedDevice Used1 :: 61=iPad; 2=iPhone; 3=Tablet; 4=Android Smartphone; 5=Desktop; 6=Laptopdotprobe_device
visitString50RecommendedVisit namedotprobe_timepoint
dotprobe_allcorrectFloatRecommendedProportion of Correct Responses Across All Trials
dotprobe_allcorrectmeanrtFloatRecommendedMean Reaction Time For All Correct Trials (ms)
dotprobe_allcorrectmedianrtFloatRecommendedMedian Reaction Time For All Correct Trials (ms)
dotprobe_allcorrectsdrtFloatRecommendedStandard Deviation Reaction Time For All Correct Trials (ms)
dotprobe_cond1correctmeanrtFloatRecommendedMean Response Time For Correct Trials After Threat Primes In Neutral-Threat (ms)
dotprobe_cond1correctmedianrtFloatRecommendedMedian Response Time For Correct Trials After Threat Primes In The Neutral-Threat (ms)
dotprobe_cond1correctsdrtFloatRecommendedStandard Deviation Of Response Times For Correct Trials After Threat Primes In Neutral-Threat (ms)
dotprobe_cond2correctFloatRecommendedProportion of Correct Responses After Neutral Primes In Neutral-Threat
dotprobe_cond2correctmeanrtFloatRecommendedMean Response Time For Correct Trials After Neutral Primes In Neutral-Threat (ms)
dotprobe_cond2correctmedianrtFloatRecommendedMedian Response Time For Correct Trials After Neutral Primes In Neutral-Threat (ms)
dotprobe_cond2correctsdrtFloatRecommendedStandard Deviation Of Response Times For Correct Trials After Neutral Primes In Neutral-Threat (ms)
dotprobe_cond3correctFloatRecommendedProportion of Correct Responses After Neutral Primes In Neutral-Neutral
dotprobe_cond3correctmeanrtFloatRecommendedMean Response Time For Correct Trials After Neutral Primes In Neutral-Neutral (ms)
dotprobe_cond3correctmedianrtFloatRecommendedMedian Response Time For Correct Trials After Neutral Primes In Neutral-Neutral (ms)
dotprobe_cond3correctsdrtFloatRecommendedStandard Deviation Of Response Times For Correct Trials After Neutral Primes In Neutral-Neutral (ms)
deviceserialnumberString200Recommendeddevice serial number/IDdotprobe_useragent
testdurationIntegerRecommendedSeconds Taken To Complete Testdotprobe_duration
testrestartsIntegerRecommendedNumber Of Times Participant Restarted Testdotprobe_reloaded
dotprobe_cond4correctmeanrtFloatRecommendedMean Response Time for Correct Trials After Positive Primes in Neutral-Positive
dotprobe_cond5correctmeanrtFloatRecommendedMean Response Time for Correct Trials After Neutral Primes in Neutral-Positive
mpdatFloatRecommendeddays from enrollmentstudyday
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.

Distribution for DataStructure: dotpt01 and Element:
Chart Help

Filters enable researchers to view the data shared in NDA before applying for access or for selecting specific data for download or NDA Study assignment. For those with access to NDA shared data, you may select specific values to be included by selecting an individual bar chart item or by selecting a range of values (e.g. interview_age) using the "Add Range" button. Note that not all elements have appropriately distinct values like comments and subjectkey and are not available for filtering. Additionally, item level detail is not always provided by the research community as indicated by the number of null values given.

Filters for multiple data elements within a structure are supported. Selections across multiple data structures will be supported in a future version of NDA.