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NDAR provides a single access to de-identified autism research data. For permission to download data, you will need an NDAR account with approved access to NDAR or a connected repository (AGRE, IAN, or the ATP). For NDAR 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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The filters you have selected from various query interfaces will be stored here, in the 'Filter Cart'. The database will be queried using filters added to your 'Filter Cart', when multiple filters are defined, each will be executed using 'AND' logic, so with each filter that is applied the result set gets smaller.

From the 'Filter Cart' you can inspect each of the filters that have been defined, and you also have the option to remove filters. The 'Filter Cart' itself will display the number of filters applied along with the number of subjects that are identified by the combination of those filters. For example a GUID filter with two subjects, followed by a GUID filter for just one of those subjects would return only data for the subject that is in both GUID filters.

If you have a question about the filter cart, or underlying filters please contact the help desk at The NDA Help Desk

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Motor Task



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Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*
src_subject_idString20RequiredSubject ID how it's defined in lab/projectid
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.age
genderString20RequiredSex of the subjectM;FM = Male; F = Femalesex
hr_lrIntegerRecommendedRisk Status0;10=LR; 1=HR
partIntegerRecommendedidentify the condition1::4Protocols 1 and 2: 1=throw condition 2= fit condition; protocol 3: 1=cylinder; 2=parallelepiped; 3=hexagonal prism; 4=triangular prism
trialIntegerRecommendedTrial number1::1801 = first; 2= second; 3=third; 4=fourth; 5=fifth; 6=sixth; etc
invalidIntegerRecommendedWas the data collection invalid0;1;20 = No; 1 = Yes, missing responses; 2 = Invalid respondent
reach_durationFloatRecommendedThe time interval between the start of reaching movement and the contact with the objectIt is expressed in seconds
place_durationFloatRecommendedThe time interval between the istant in which the objects is lifted from the table and the istant in which it is released into the targetIt is expressed in seconds
latency_reach_placeFloatRecommendedThe time interval between the end of reaching phase and the beginning of the placement phaseIt is expressed in seconds
score_reachIntegerRecommendedscore assigned to the reaching movement0;10 = no reaching; 1 = successful reaching
score_placeIntegerRecommendedscore assigned to the placement movement0::20 = no placement; 1= no successful placement; 2= successful placement
hand_reachIntegerRecommendedHand used in the reaching phase0::20 = right; 1=left; 2=both
hand_placeIntegerRecommendedHand used in the placement phase0::20 = right; 1=left; 2=both
mean_acc_reachFloatRecommendedMean acceleration in the reaching phaseit is expressed in m/s^2
mean_acc_placeFloatRecommendedMean acceleration in the reaching phaseit is expressed in m/s^2
peak_acc_reachFloatRecommendedMax acceleration in the reaching phaseit is expressed in m/s^2
peak_acc_placeFloatRecommendedMax acceleration in the reaching phaseit is expressed in m/s^2
jerk_reachFloatRecommendedSmootness of movement defined as mean squared jerkJerk is the first temporal derivative of acceleration. Lower value means higher smoothness
jerk_placeFloatRecommendedSmootness of movement defined as mean squared jerkJerk is the first temporal derivative of acceleration. Lower value means higher smoothness
max_acc_phase_reachFloatRecommendedratio between the time to reach the maximum acceleration and the total duration of reaching phaseIt is a percentage value
max_acc_phase_placeFloatRecommendedratio between the time to reach the maximum acceleration and the total duration of placement phaseIt is a percentage value
protocol_motIntegerRequiredIdentfies the motor task being completed1::31=ball; 2=block; 3=shape sorterprotocol
shape_orientationIntegerRecommendedOrientation of shape at reach onset; applies only to PROTOCOL 30;10= vertical; 1=horizontal
first_contact_durationFloatRecommendedThe time interval between the first moment the object comes in contact with the top of the shape sorter and the instant it is released into the target; applies onto to PROTOCOL 3
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: motask01 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.