NDA Help Center

Login Dialog

Frequently Asked Questions


NDA Help Center

Filter Cart

The Filter Cart provides a way to query and access data for which you may be interested.  There are multiple places to go query and Add to Filter Cart (Sometimes called Download).  

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 add subjects, sometimes it may take a few minutes to populate.  You can continue to do other things 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 available for the subjects selected 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 available.  However, if you want to see all of the clinical and phenotype, then select, "Find All Subject Data" to see all the data avaialble for those subjects.  

when a secord or third filter is applied, an AND condition is used to determine the subjects that are exist in all filters.  If the subject does not appear in any filter, that subjects data will be excluded from your filter cart. Given the sparcity of data in the NDA, it is possible for no subjects to appear across filters.  If that happens, clear your filter cart, and start over.  

The NDA is looking to enhance query/filtering.  Until additional tools become available, it is best to package more data than you need and then package and download the data and use other tools to further restrict and analyze the data.  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



Reset Password

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.

Warning Notice

This is a U.S. Government computer system, which may be accessed and used only for authorized Government business by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action. All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Such information includes sensitive data encrypted to comply with confidentiality and privacy requirements. Access or use of this computer system by any person, whether authorized or unauthorized, constitutes consent to these terms. There is no right of privacy in this system.

You have logged in with a temporary password. Please update your password. Passwords must contain 8 or more characters and must contain at least 3 of the following types of characters:

Subscribe to our mailing list

Mailing List(s)
Email Format

You are now leaving the National Database for Autism Research (NDAR) web site to go to:

Click on the address above if the page does not change within 10 seconds.


NDAR is not responsible for the content of this external site and does not monitor other web sites for accuracy.

Accept Terms
Selected Filters
No filters selected

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

Value Range
Data Structures with shared data
No filters have been selected
Switch User

1 Numbers reported are subjects by age
New Trial
New Project

Format should be in the following format: Activity Code, Institute Abbreviation, and Serial Number. Grant Type, Support Year, and Suffix should be excluded. For example, grant 1R01MH123456-01A1 should be entered R01MH123456

Please select an experiment type below

SelectExperiment IdExperiment NameExperiment Type
  • Select One
  • EEG
  • EGG
  • Eye Tracking
  • Omics
  • fMRI
Created On
955Food Choice TaskfMRI06/21/2018
953Shallow EpisodicfMRI06/20/2018
952Semantic EncodingfMRI06/20/2018
951Resting StatefMRI06/20/2018
949Resting StatefMRI06/18/2018
943Emotional Face TaskfMRI06/13/2018
941Meridians localizerfMRI06/07/2018
940V1 localizer movingDotsfMRI06/07/2018
938MT localizer dots movingDotsfMRI06/07/2018
937MT localizer gratings movingDotsfMRI06/07/2018
936V1 localizer peripheryfMRI06/07/2018
935Contrast peripheryfMRI06/07/2018
934MT localizer peripheryfMRI06/07/2018
933Pilot01: Posner Cueing with st-tACSEye Tracking06/06/2018
932Social- Theory of Mind Localizer TaskfMRI06/01/2018
931Faces TaskfMRI05/31/2018
929Moral RatingfMRI05/30/2018
928Pain Detection fMRI05/30/2018
927Reward TaskfMRI05/30/2018
926Go no Go TaskfMRI05/30/2018
924EARLI Placenta WGBSOmics05/24/2018
923Anxiety-CBT fMRI (pre-post) - Version 4 BlockfMRI05/15/2018
922Anxiety-CBT fMRI (pre-post) - Version 3 BlockfMRI05/15/2018
921Anxiety-CBT fMRI (pre-post) - Version 2 BlockfMRI05/15/2018
920Anxiety-CBT fMRI (pre-post) - Version 1 BlockfMRI05/15/2018
919Neural overlap in item representations across episodes impairs context memoryfMRI05/11/2018
918ReferenceTissue: U01MH106892_Brain_Amplicon_SeqOmics05/08/2018
914PFC analysis in bloodOmics04/27/2018
913Task and emotional content driven visual competitionfMRI04/27/2018
912Task and emotional content driven visual competitionEEG04/23/2018
911Resting StatefMRI04/20/2018
910Modified Monetary Incentive Delay fMRI04/20/2018
908Resting State Pre-Stress Visit 1fMRI04/20/2018
907Montreal Imaging Stress Task Visit 1fMRI04/18/2018
9062-back Post-Stress Visit 1fMRI04/18/2018
9051-back Post-Stress Visit 1fMRI04/18/2018
9040-back Post-Stress Visit 1fMRI04/18/2018
9032-back Pre-Stress Visit 1fMRI04/18/2018
9021-back Pre-Stress Visit 1fMRI04/18/2018
9010-back Pre-Stress Visit 1fMRI04/18/2018
899Investigating a Neurobehavioral Mechanism of Paranoia - Resting State ScansfMRI04/06/2018
Collection - Add Experiment
Add Supporting Documentation
Select File

Please enter the name of the data structure to search or if your definition does not exist, please upload that definition so that it can be appropriately defined for submission. Multiple data structures may be associated with a single Data Expected entry. Please add only one data structure per assessment.






You have requested to move the sharing dates for the following assessments:
Data Expected Item Original Sharing Date New Sharing Date

Please provide a reason for this change, which will be sent to the Program Officers listed within this collection:

Explanation must be between 20 and 200 bytes in length.

Please press Save or Cancel

Collection Owners and those with Collection Administrator permission, may edit a collection. The following is currently available for Edit on this page:


Title, investigators, and Collection Description may be edited along with the Collection Phase. For Collection Phase, the options Pre-enrollment, Enrollment, and Completed can be chosen allowing the Collection Owner to indicate the stage of data collection.

Funding Source

The ability to associate the funding source for the project is provided. For NIH funded grants, linkage to Project Reporter information (e.g. R01MH123456) is supported. Projects funded by others, including the URL of the project, are listed. Non NIH funded projects will become available here to link that data with the appropriate funding agency.

Supporting Documentation

Any documents related to the project may be uploaded clarifying the data or acquisition methods used may be uploaded and made available here. The default is to share these documents to the general public. An option to share only to qualified Researchers is also an option.

Clinical Trials

For clinical trials, the option to link to the clinical trial in clinicaltrials.gov is optionally provided.

Collection Summary Collection Charts
Collection Title Collection Investigators Collection Description
Autism: Social and Communication Predictors in Siblings (Landa) AND Effects of Active Motor and Social Training on Developmental Trajectories in Infants at High-risk for Autism Spectrum Disorders (Libertus)
Rebecca Landa, Klaus Libertus 
The purpose of the proposed study is to identify very early indicators of ASD, beginning in infancy. Specific aims are to: (1) define markers of disrupted neurobehavioral development that appear between 6 and 14 months of age, before clinical signs of ASD; (2) translate ASD clinical indicators identified in the second year of life into early ASD diagnostic criteria applicable to 1- and 2-year olds; and (3) define protective factors associated with outcomes in sibs-A to inform treatment approaches. These aims will be achieved through the use of a prospective, longitudinal research design where assessments occur at regular intervals between 6 and 36 months. Participants will include younger siblings of children with autism (sibs-A) who are at high genetic risk for ASD as well as language and social delays; preterm infants, who are at high risk for developmental delays but lower risk for ASD than sibs-A; and younger siblings of children with typical development who are deemed to be at low risk for developing ASD. At 36 months, children will receive confirmatory outcome classification into one of three groups: ASD; Non-ASD Delay; and No Delays. Measures administered at each age assess visual attention to social and non-social stimuli, motor and communication development, object exploration, understanding of others intended actions, and ASD symptoms. Statistical analyses will include ANOVA, Pearson's correlation, Classification and Regression Trees, regression models, and propensity score methods. High-impact findings are anticipated. Based on discoveries from this study about the nature of very early disruptions in development, new ASD screeners for infants and toddlers may be developed that are more sensitive and specific than existing tools. In addition, proposals for the content and instructional methods used in very early interventions will be made. Such interventions may prevent aspects of the ASD phenotype from emerging, or dampen the severity of expression of the disorder.
Funding Completed
Loading Chart...
NIH - Extramural None
Autism Science Foundation None

R01MH059630-11 Autism: Social and Communication Predictors in Siblings 09/01/2012 03/31/2018 560 264 HUGO W. MOSER RES INST KENNEDY KRIEGER $3,487,870.00

Collection Owners and those with Collection Administrator permission, may edit a collection. The following is currently available for Edit on this page:


To create a new Omics, eye tracking, fMRI, or EEG experiment, press the "+ New Experiment" button. Once an experiment is created, then raw files for these types of experiments should be provided, associating the experiment – through Experiment_ID – with the metadata defined in the experiments interface.

IDNameCreated DateStatusType
No records found.

Collection Owners and those with Collection Administrator permission, may edit a collection. The following is currently available for Edit on this page:

Shared Data

Data structures with the number of subjects submitted and shared are provided.

Autism Diagnostic Interview, Revised (ADI-R) Clinical Assessments 1
Autism Diagnostic Observation Schedule, 2nd Edition (ADOS-2) - Module 1 Clinical Assessments 13
Autism Diagnostic Observation Schedule, 2nd Edition (ADOS-2) - Module 2 Clinical Assessments 99
DSM-IV Checklist (Early Steps; SOFAS) Clinical Assessments 116
Research Subject Clinical Assessments 342
Structured Play Summary Clinical Assessments 104
Vineland-II - Survey Form (2005) Clinical Assessments 305

Collection Owners and those with Collection Administrator permission, may edit a collection. The following is currently available for Edit on this page:


Publications relevant to NDAR data are listed below. Most displayed publications have been associated with the grant within Pubmed. Use the "+ New Publication" button to add new publications. Publications relevant/not relevant to data expected are categorized. Relevant publications are then linked to the underlying data by selecting the Create Study link. Study provides the ability to define cohorts, assign subjects, define outcome measures and lists the study type, data analysis and results. Analyzed data and results are expected in this way.

PubMed IDStudyTitleJournalAuthorsDateStatus
29204130Create StudyDevelopment of Attention to Faces during the First 3 Years: Influences of Stimulus Type.Frontiers in psychologyLibertus K, Landa RJ, Haworth JLJanuary 2017Not Determined
27417857Create StudyNon-ASD outcomes at 36 months in siblings at familial risk for autism spectrum disorder (ASD): A baby siblings research consortium (BSRC) study.Autism research : official journal of the International Society for Autism ResearchCharman T, Young GS, Brian J, Carter A, Carver LJ, Chawarska K, Curtin S, Dobkins K, Elsabbagh M, Georgiades S, Hertz-Picciotto I, Hutman T, Iverson JM, Jones EJ, Landa R, Macari S, Messinger DS, Nelson CA, Ozonoff S, Saulnier C, Stone WL, Tager-Flusberg H, Webb SJ, Yirmiya N, Zwaigenbaum LJanuary 2017Not Determined
27358719Create StudyCommentary: sex difference differences? A reply to Constantino.Molecular autismMessinger DS, Young GS, Webb SJ, Ozonoff S, Bryson SE, Carter A, Carver L, Charman T, Chawarska K, Curtin S, Dobkins K, Hertz-Picciotto I, Hutman T, Iverson JM, Landa R, Nelson CA, Stone WL, Tager-Flusberg H, Zwaigenbaum L2016Not Relevant
27252667Create StudyReady, Set, Go! Low Anticipatory Response during a Dyadic Task in Infants at High Familial Risk for Autism.Frontiers in psychologyLanda RJ, Haworth JL, Nebel MBJanuary 2016Not Determined
26903251Create StudyProspective Longitudinal Studies of Infant Siblings of Children With Autism: Lessons Learned and Future Directions.Journal of the American Academy of Child and Adolescent PsychiatrySzatmari P, Chawarska K, Dawson G, Georgiades S, Landa R, Lord C, Messinger DS, Thurm A, Halladay AMarch 2016Not Determined
25921776Create StudyDiagnostic stability in young children at risk for autism spectrum disorder: a baby siblings research consortium study.Journal of child psychology and psychiatry, and allied disciplinesOzonoff S, Young GS, Landa RJ, Brian J, Bryson S, Charman T, Chawarska K, Macari SL, Messinger D, Stone WL, Zwaigenbaum L, Iosif AMSeptember 2015Not Determined
25457930Create Study18-month predictors of later outcomes in younger siblings of children with autism spectrum disorder: a baby siblings research consortium study.Journal of the American Academy of Child and Adolescent PsychiatryChawarska K, Shic F, Macari S, Campbell DJ, Brian J, Landa R, Hutman T, Nelson CA, Ozonoff S, Tager-Flusberg H, Young GS, Zwaigenbaum L, Cohen IL, Charman T, Messinger DS, Klin A, Johnson S, Bryson SDecember 2014Not Determined
25295021Create StudyScaffolded reaching experiences encourage grasping activity in infants at high risk for autism.Frontiers in psychologyLibertus K, Landa RJ2014Not Determined
25245349Create StudyEarly head growth in infants at risk of autism: a baby siblings research consortium study.Journal of the American Academy of Child and Adolescent PsychiatryZwaigenbaum L, Young GS, Stone WL, Dobkins K, Ozonoff S, Brian J, Bryson SE, Carver LJ, Hutman T, Iverson JM, Landa RJ, Messinger DOctober 2014Not Determined
24978128Create StudyLimited fine motor and grasping skills in 6-month-old infants at high risk for autism.Child developmentLibertus K, Sheperd KA, Ross SW, Landa RJ2014 Nov-DecNot Determined
24140841Create StudyThe Early Motor Questionnaire (EMQ): a parental report measure of early motor development.Infant behavior & developmentLibertus K, Landa RJDecember 2013Not Determined
23739542Create StudyAssociation between severity of behavioral phenotype and comorbid attention deficit hyperactivity disorder symptoms in children with autism spectrum disorders.Autism : the international journal of research and practiceRao PA, Landa RJApril 2014Not Determined
23452686Create StudyBeyond autism: a baby siblings research consortium study of high-risk children at three years of age.Journal of the American Academy of Child and Adolescent PsychiatryMessinger D, Young GS, Ozonoff S, Dobkins K, Carter A, Zwaigenbaum L, Landa RJ, Charman T, Stone WL, Constantino JN, Hutman T, Carver LJ, Bryson S, Iverson JM, Strauss MS, Rogers SJ, Sigman MMarch 2013Not Determined
23110514Create StudyDevelopmental trajectories in children with and without autism spectrum disorders: the first 3 years.Child developmentLanda RJ, Gross AL, Stuart EA, Faherty A2013 Mar-AprNot Determined
22982285Create StudyRelation between early motor delay and later communication delay in infants at risk for autism.Infant behavior & developmentBhat AN, Galloway JC, Landa RJDecember 2012Not Determined
22958474Create StudyInfant siblings and the investigation of autism risk factors.Journal of neurodevelopmental disordersNewschaffer CJ, Croen LA, Fallin MD, Hertz-Picciotto I, Nguyen DV, Lee NL, Berry CA, Farzadegan H, Hess HN, Landa RJ, Levy SE, Massolo ML, Meyerer SC, Mohammed SM, Oliver MC, Ozonoff S, Pandey J, Schroeder A, Shedd-Wise KM2012Not Determined
22917124Create StudyHead lag in infants at risk for autism: a preliminary study.The American journal of occupational therapy : official publication of the American Occupational Therapy AssociationFlanagan JE, Landa R, Bhat A, Bauman M2012 Sep-OctNot Determined
22574686Create StudyLatent class analysis of early developmental trajectory in baby siblings of children with autism.Journal of child psychology and psychiatry, and allied disciplinesLanda RJ, Gross AL, Stuart EA, Bauman MSeptember 2012Not Determined
21844053Create StudyRecurrence risk for autism spectrum disorders: a Baby Siblings Research Consortium study.PediatricsOzonoff S, Young GS, Carter A, Messinger D, Yirmiya N, Zwaigenbaum L, Bryson S, Carver LJ, Constantino JN, Dobkins K, Hutman T, Iverson JM, Landa R, Rogers SJ, Sigman M, Stone WLSeptember 2011Not Determined
21584850Create StudyPredictive and concurrent validity of parent concern about young children at risk for autism.Journal of autism and developmental disordersHess CR, Landa RJApril 2012Not Determined
20456532Create StudySocial and non-social visual attention patterns and associative learning in infants at risk for autism.Journal of child psychology and psychiatry, and allied disciplinesBhat AN, Galloway JC, Landa RJSeptember 2010Not Determined
20361243Create StudyOnset patterns prior to 36 months in autism spectrum disorders.Journal of autism and developmental disordersKalb LG, Law JK, Landa R, Law PANovember 2010Not Determined
18253102Create StudyDiagnosis of autism spectrum disorders in the first 3 years of life.Nature clinical practice. NeurologyLanda RJMarch 2008Not Determined
17606819Create StudySocial and communication development in toddlers with early and later diagnosis of autism spectrum disorders.Archives of general psychiatryLanda RJ, Holman KC, Garrett-Mayer EJuly 2007Not Determined
17216332Create StudyResponse to joint attention in toddlers at risk for autism spectrum disorder: a prospective study.Journal of autism and developmental disordersSullivan M, Finelli J, Marvin A, Garrett-Mayer E, Bauman M, Landa RJanuary 2007Not Determined
16712640Create StudyDevelopment in infants with autism spectrum disorders: a prospective study.Journal of child psychology and psychiatry, and allied disciplinesLanda R, Garrett-Mayer EJune 2006Not Determined
16161095Create StudyAssessment of social communication skills in preschoolers.Mental retardation and developmental disabilities research reviewsLanda, Rebecca J2005Not Determined

Relevant Publications
PubMed IDStudyTitleJournalAuthorsDate
No records found.
Data Expected
Data ExpectedTargeted EnrollmentInitial SubmissionSubjects SharedStatus
Vineland (Parent and Caregiver) info iconApproved
Research Subject and Pedigree info iconApproved
ADOS info iconApproved
DSM IV Criteria info iconApproved
Structured Play Assessment info iconApproved
ADI-R info iconApproved
Object Contingency Imitation info iconApproved
Understanding Others Intention info iconApproved
Self-Generated Engagement (Social and Object) info iconApproved
Communication and Symbolic Behavior Scales (CSBS) info iconApproved
Eye Tracking info iconApproved
Mullen Scales of Early Learning info iconApproved
Treatment History Measure info iconApproved
Parent-Child Play Sample info iconApproved
Structure not yet defined

Collection Owners and those with Collection Administrator permission, may edit a collection. The following is currently available for Edit on this page:

Associated Studies

Studies that have been defined using data from a Collection are important criteria to determine the value of data shared. The number of subjects column displays the counts from this Collection that are included in a Study, out of the total number of subjects in that study. The Data Use column represents whether or not the study is a primary analysis of the data or a secondary analysis. State indicates whether the study is private or shared with the research community.

Study NameAbstractCollection/Study SubjectsData UsageState
No records found.