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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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NDA provides a single access to de-identified autism research data. For permission to download data, you will need an NDA account with approved access to NDA or a connected repository (AGRE, IAN, or the ATP). For NDA access, you need to be a research investigator sponsored by an NIH recognized institution with federal wide assurance. See Request Access for more information.

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Linguistic Inquiry and Word Count



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/project
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired field
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
ear_liwc_1IntegerRecommendedWord count0::999999Total number of words in text
ear_liwc_2FloatRecommendedAnalytical thinking0::100Percentage of words in text
ear_liwc_3FloatRecommendedClout0::100Percentage of words in text
ear_liwc_4FloatRecommendedAuthentic0::100Percentage of words in text
ear_liwc_5FloatRecommendedEmotional tone0::100Percentage of words in text
ear_liwc_6FloatRecommendedWords/sentence0::100Percentage of words in text
ear_liwc_7FloatRecommendedWords > 6 letters0::100Percentage of words in text
ear_liwc_8FloatRecommendedDictionary words0::100Percentage of words in text
ear_liwc_9FloatRecommendedTotal function words0::100Percentage of words in text
ear_liwc_10FloatRecommendedTotal pronouns0::100Percentage of words in text
ear_liwc_11FloatRecommendedPersonal pronouns0::100Percentage of words in text
ear_liwc_12FloatRecommended1st pers singular0::100Percentage of words in text
ear_liwc_13FloatRecommended1st pers plural0::100Percentage of words in text
ear_liwc_14FloatRecommended2nd person0::100Percentage of words in text
ear_liwc_15FloatRecommended3rd pers singular0::100Percentage of words in text
ear_liwc_16FloatRecommended3rd pers plural0::100Percentage of words in text
ear_liwc_17FloatRecommendedImpersonal pronouns0::100Percentage of words in text
ear_liwc_18FloatRecommendedArticles0::100Percentage of words in text
ear_liwc_19FloatRecommendedPrepositions0::100Percentage of words in text
ear_liwc_20FloatRecommendedAuxiliary verbs0::100Percentage of words in text
ear_liwc_21FloatRecommendedCommon Adverbs0::100Percentage of words in text
ear_liwc_22FloatRecommendedConjunctions0::100Percentage of words in text
ear_liwc_23FloatRecommendedNegations0::100Percentage of words in text
ear_liwc_24FloatRecommendedCommon verbs0::100Percentage of words in text
ear_liwc_25FloatRecommendedCommon adjectives0::100Percentage of words in text
ear_liwc_26FloatRecommendedComparisons0::100Percentage of words in text
ear_liwc_27FloatRecommendedInterrogatives0::100Percentage of words in text
ear_liwc_28FloatRecommendedNumbers0::100Percentage of words in text
ear_liwc_29FloatRecommendedQuantifiers0::100Percentage of words in text
ear_liwc_30FloatRecommendedAffective processes0::100Percentage of words in text
ear_liwc_31FloatRecommendedPositive emotion0::100Percentage of words in text
ear_liwc_32FloatRecommendedNegative emotion0::100Percentage of words in text
ear_liwc_33FloatRecommendedAnxiety0::100Percentage of words in text
ear_liwc_34FloatRecommendedAnger0::100Percentage of words in text
ear_liwc_35FloatRecommendedSadness0::100Percentage of words in text
ear_liwc_36FloatRecommendedSocial processes0::100Percentage of words in text
ear_liwc_37FloatRecommendedFamily0::100Percentage of words in text
ear_liwc_38FloatRecommendedFriends0::100Percentage of words in text
ear_liwc_39FloatRecommendedFemale references0::100Percentage of words in text
ear_liwc_40FloatRecommendedMale references0::100Percentage of words in text
ear_liwc_41FloatRecommendedCogntive processes0::100Percentage of words in text
ear_liwc_42FloatRecommendedInsight0::100Percentage of words in text
ear_liwc_43FloatRecommendedCausation0::100Percentage of words in text
ear_liwc_44FloatRecommendedDiscrepancy0::100Percentage of words in text
ear_liwc_45FloatRecommendedTentative0::100Percentage of words in text
ear_liwc_46FloatRecommendedCertainty0::100Percentage of words in text
ear_liwc_47FloatRecommendedDifferentiation0::100Percentage of words in text
ear_liwc_48FloatRecommendedPerceptual processes0::100Percentage of words in text
ear_liwc_49FloatRecommendedSee0::100Percentage of words in text
ear_liwc_50FloatRecommendedHear0::100Percentage of words in text
ear_liwc_51FloatRecommendedFeel0::100Percentage of words in text
ear_liwc_52FloatRecommendedBiological Processes0::100Percentage of words in text
ear_liwc_53FloatRecommendedBody0::100Percentage of words in text
ear_liwc_54FloatRecommendedHealth0::100Percentage of words in text
ear_liwc_55FloatRecommendedSexual0::100Percentage of words in text
ear_liwc_56FloatRecommendedIngestion0::100Percentage of words in text
ear_liwc_57FloatRecommendedDrives0::100Percentage of words in text
ear_liwc_58FloatRecommendedAffiliation0::100Percentage of words in text
ear_liwc_59FloatRecommendedAchievement0::100Percentage of words in text
ear_liwc_60FloatRecommendedPower0::100Percentage of words in text
ear_liwc_61FloatRecommendedReward0::100Percentage of words in text
ear_liwc_62FloatRecommendedRisk0::100Percentage of words in text
ear_liwc_63FloatRecommendedTime orientations0::100Percentage of words in text
ear_liwc_64FloatRecommendedPast focus0::100Percentage of words in text
ear_liwc_65FloatRecommendedPresent focus0::100Percentage of words in text
ear_liwc_66FloatRecommendedFuture focus0::100Percentage of words in text
ear_liwc_67FloatRecommendedRelativity0::100Percentage of words in text
ear_liwc_68FloatRecommendedMotion0::100Percentage of words in text
ear_liwc_69FloatRecommendedSpace0::100Percentage of words in text
ear_liwc_70FloatRecommendedTime0::100Percentage of words in text
ear_liwc_71FloatRecommendedPersonal concerns0::100Percentage of words in text
ear_liwc_72FloatRecommendedWork0::100Percentage of words in text
ear_liwc_73FloatRecommendedLeisure0::100Percentage of words in text
ear_liwc_74FloatRecommendedHome0::100Percentage of words in text
ear_liwc_75FloatRecommendedMoney0::100Percentage of words in text
ear_liwc_76FloatRecommendedReligion0::100Percentage of words in text
ear_liwc_77FloatRecommendedDeath0::100Percentage of words in text
ear_liwc_78FloatRecommendedInformal language0::100Percentage of words in text
ear_liwc_79FloatRecommendedSwear words0::100Percentage of words in text
ear_liwc_80FloatRecommendedNetspeak0::100Percentage of words in text
ear_liwc_81FloatRecommendedAssent0::100Percentage of words in text
ear_liwc_82FloatRecommendedNonfluencies0::100Percentage of words in text
ear_liwc_83FloatRecommendedFillers0::100Percentage of words in text
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: liwc01 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.