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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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Data Structures with shared data
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0 Shared Subjects

Guidelines for using human event-related potentials to study cognition: Recording standards and publication criteria. T.W. PICTON, S. BENTIN, P. BERG, E. DONCHIN, S.A. HILLYARD, R. JOHNSON, JR., G.A. MILLER, W. RITTER, D.S. RUCHKIN, M.D. RUGG, and M.J. TAYLOR
Neurosignal Recordings
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picton_tw_00_127.pdf PDF file icon
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 Required field
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.
sex String 20 Required Sex of the subject M;F M = Male; F = Female gender
task String 4,000 Required Cognitive process being studied
behavioral_responses_type String 100 Required Description of monitored behevioral responses
behavioral_responses_file File Required Behavioral responses file
physiological_responses_type String 100 Required Description of monitored physiological responses
physiological_responses_file File Required Physiological responses file
Query exp_block_nubmer Integer Required number of experimental blocks
exp_block_1 String 100 Required Description of block 1 design
Query exp_block_time_1 Integer Required Block 1 time
exp_block_2 String 100 Required Description of block 2 design
Query exp_block_time_2 Integer Required Block 2 time
subj_sensory_ability String 100 Required subject's sensory ability
subj_motor_ability String 100 Required subject's motor ability
subj_sensory_response String 100 Required subject's sensory response
subj_motor_response String 100 Required subject's motor response
stimuli_type String 50 Required type of stimuli i.e. visual, sound, etc.
subj_cognitive_ability String 100 Required subject's cognitiveability
subj_cognitive_response String 100 Required subject's cognitive response
medication_list_file File Required medication list
cllinical_diagnosis String 100 Required clinical diagnosis Autism; PDD-NOS; Asperger's; ADHD; Language Disorder; Other; None
stimuli_detail String 100 Required stimuli description
stimuli_detail_file File Recommended stimuli detail in file
stimuli_response String 100 Required response to stimuli
stimuli_response_file File Required response to stimuli file
stimuli_timing String 100 Required stimuli timing
electrode_type String 100 Required Type of used electrodes
Query electrode_impedance Integer Required electrode impedance in kOhm
electrode_location String 100 Required Description of electrode position coordinate information
electrode_location_file File Required File containing electrode position coordinate information
electrode_fix_method String 100 Required description of how electrode are affixed to subject' head
artifact_cleaning String 100 Required the way in which artifact-contaminated single channels are treated
reference String 100 Required description of reference recording
Query gain_resolution Integer Required gain or resolution of recording system
filter String 100 Required description of filtering charachteristics
Query convertion_rate Integer Required rate of A/D convertion
Query response_average Integer Required number of responses for averaging
erp_time_lock String 100 Required the way of ERP time locked to stimuli
compensation_proced String 100 Required latency-compensation procedures
filter_algorithm String 100 Required filtering algorithm
artifact_noncerebral String 100 Required noncerebral artifacts
artifact_reject String 100 Required criteria for rejecting artifact-contaminated trials
artifact_compensat String 100 Required artifact compencation procedure
erp_waveforms File Required ERP waveforms file
erp_temporal File Required ERP temporal
erp_spatial File Required ERP spatial
erp_voltage File Required ERP voltage
erp_time_calibration File Required time calibration
erp_polarity File Required ERP polarity
electrode_waveform_location File Required electrode location on waveforms
electrode_map File Required electrode map
viewpoint_scalp_map File Required viewpoint for scalp-distribution map
vendor String 100 Recommended Vendor
equipment String 100 Recommended name of used equipment
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.