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Frequently Asked Questions


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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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Electro-dermal Activity

1,005 Shared Subjects

Clinical Assessments
Task Based
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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_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.
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY Required field studyday
sex String 20 Required Sex of the subject M;F M = Male; F = Female gender, sex
Query scl Float Recommended Task mean level (SCL) in microsiemens 0::100 t1scl_tr, t1scl_wr, t2scl_tr, t2scl_wr, t3scl_wr, t4scl_wr, t5scl_wr, t6scl_wr, t7scl_wr, t8scl_wr, t9scl_wr
Query nscr Integer Recommended Task non-specific skin conductance responses (NSCRs) 0::500 t1nscr_tr, t1nscr_wr, t2nscr_tr, t2nscr_wr, t3nscr_wr, t4nscr_wr, t5nscr_wr, t6nscr_wr, t7nscr_wr, t8nscr_wr, t9nscr_wr
ncttsk String 250 Recommended Name of task.
overall_movement String 500 Recommended Overall movement t1_movement_wr, t2_movement_wr, t3_movement_wr, t4_movement_wr, t5_movement_wr, t6_movement_wr, t7_movement_wr, t8_movement_wr, t9_movement_wr
desc_worklength String 100 Recommended Work duration t1_tasklength, t2_tasklength, t3_tasklength, t4_tasklength, t5_tasklength, t6_tasklength, t7_tasklength, t8_tasklength, t9_tasklength
data_file1 File Recommended Data file 1
site String 101 Recommended Site Study Site siteid
Query timept Integer Recommended Time Point 888 = not applicable; 999 = missing timepoint
Query eseniteration Integer Recommended e-Sense Iteration (1=Baseline or 2=Interview) 1 :: 2 1=Baseline; 2=Interview
Query esentimehr Integer Recommended e-Sense 24-Hour Clock Time (Hour) 0 :: 23
Query esentimemin Integer Recommended e-Sense 24-Hour Clock Time (Minutes) 0 :: 59
Query esentotmins Float Recommended Total Minutes of e-Sense sampling
Query esenminmicros Float Recommended Minimum Microsiemens During e-Sense
Query esenmaxmicros Float Recommended Maximum Microsiemens During e-Sense
Query esenminmaxdiff Float Recommended Difference Between Min and Max Microsiemens
Query esensampletime Float Recommended Time Interval per Sample in Deciseconds
Query esensamplemicros Float Recommended Microsiemens Measured per Sample
Query esenbase Float Recommended Mean of Last 10 Seconds of Baseline Reading (Microsiemens)
Query esenintvstart Float Recommended Mean of First 10 Seconds of Interview Reading (Microsiemens)
Query esenintvmax Float Recommended Max Value in Interview Reading (Microsiemens)
Query esenintvmaxtp Float Recommended Time Point of Max Value in Interview Reading (Deciseconds)
Query esenintvend Float Recommended Mean of Last 10 Seconds of Interview Reading (Microsiemens)
Query esenscr Float Recommended e-Sense Score: eSenIntvMax - eSenBase (Microsiemens)
Query esenrise Float Recommended e-Sense Rise: eSenIntvMax - eSenIntvStart (Microsiemens)
Query esenhab1 Float Recommended e-Sense Habituation After Trauma Description: eSenIntvMax - eSenIntvEnd
Query esenhab2 Float Recommended e-Sense Habituation Over Interview: eSenIntvStart - eSenIntvEnd
data_file2 File Recommended data file 2
data_file2_type String 100 Recommended data file 2 type/description
data_file1_type String 300 Recommended type of data file 1
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.