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Filter Cart

Viewable at the top right of NDA pages, the Filter Cart is a temporary holder for filters and data they select. Filters are added to the Workspace first, before being submitted to The Filter Cart. Data selected by filters in the Filter Cart can be added to a Data Package or an NDA Study from the Data Packaging Page, by clicking the 'Create Data Package / Add Data to Study' button.

The filter cart supports combining multiple filters together, and depending on filter type will use "AND" or "OR"  when combining filters.

Multiple selections from the same filter type will result in those selections being applied with an ‘OR’ condition. For example, if you add an NDA Collection Filter with selections for both collections 2112 and 2563 to an empty Workspace, the subjects from NDA Collection 2112 ‘OR’ NDA Collection 2563 will be added to your Workspace even if a subject is in both NDA Collections. You can then add other NDA Collections to your Workspace which further extends the ‘OR’ condition.

If a different filter type is added to your Workspace, or a filter has already been submitted to the Filter Cart, the operation then performs a logical ‘AND’ operation. This means that given the subjects returned from the first filter, only those subjects that matched the first filter are returned by the second filter (i.e., subjects that satisfied both filters). Note that only the subjects specific to your filter will be added to your Filter Cart and only on data shared with the research community. Other data for those same subjects may exist (i.e., within another NDA Collection, associated with a data structure that was not requested in the query, etc.). So, users should select ‘Find all Subjects Data’ to identify all data for those specific subjects. 

Additional Tips:

  • You may query the data without an account, but to gain access you will need to create an NDA user account and apply for access.  Most data access requires that you or your lab are sponsored by an NIH recognized institution with Federal Wide Assurance (FWA).  Without access, you will not be able to obtain individual-level data. 

    Once you have selected data of interest you can:
  • Create a data package - This allows you to specify format for access/download
  • Assign to Study Cohort - Associate the data to an NDA Study allowing for a DOI to be generated and the data to be linked directly to a finding, publication, or data release. 
  • Find All Subject Data - Depending on filter types being used, not all data associated with a subject will be selected.  Data may be restricted by data structure, NDA Collection, or outcome variables (e.g., NDA Study). ‘Find All Data’ expands the fliter criteria by replacing all filters in your Filter Cart with a single Query by GUID filter for all subjects selected by those filters.

    Please Note:
  • When running a query, it may take a moment to populate the Filter Cart. Queries happen in the background so you can define other queries during this time. 
  • When you add your first filter, all data associated with your query will be added to the Filter Cart (e.g., a Concept, an NDA Collection, a Data Structure/Element, etc.). As you add additional filters, they will also display in the Filter Cart. Only the name of filter will be shown in the Filter Cart, not the underlying structures. 
  • Information about the contents of the Filter Cart can be seen by clicking "Edit”.
  • Once your results appear in the Filter Cart, you can create a data package or assign subjects to a study by selecting the 'Package/Assign to Study' option. You can also 'Edit' or 'Clear' filters.

Frequently Asked Questions

  • The Filter Cart currently employs basic AND/OR Boolean logic. A single filter may contain multiple selections for that filter type, e.g., a single NDA Study filter might contain NDA Study 1 and NDA Study 2. A subject that is in EITHER 1 OR 2 will be returned.  Adding multiple filters to the cart, regardless of type, will AND the result of each filter.  If NDA Study 1 and NDA Study 2 are added as individual filters, data for a subject will only be selected if the subject is included in  BOTH 1 AND 2.

  • Viewable at the top right of NDA pages, the Filter Cart is a temporary holder of data identified by the user, through querying or browsing, as being of some potential interest. The Filter Cart is where you send the data from your Workspace after it has been filtered.

  • After filters are added to the Filter Cart, users have options to ‘Create a Package’ for download, ‘Associate to Study Cohort’, or ‘Find All Subject Data’. Selecting ‘Find All Subject Data’ identifies and pulls all data for the subjects into the Filter Cart. Choosing ‘Create a Package’ allows users to package and name their query information for download. Choosing ‘Associate to Study Cohort’ gives users the opportunity to choose the Study Cohort they wish to associate this data.


  • Once your filter cart contains the subjects of interest, select Create Data Package/Assign to Data Study which will provide options for accessing item level data and/or assigning to a study.  

  • Once queries have been added to your workspace, the next step is to Submit the Filters in the workspace to the Filter Cart.  This process runs the queries selected, saving the results within a filter cart attached to your account.  

  • The Workspace within the General Query Tool is a holding area where you can review your pending filters prior to adding them to Filter Cart. Therefore, the first step in accessing data is to select one or more items and move it into the Workspace. 


Reset Password

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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Continuous Performance Test

1,722 Shared Subjects

Clinical Assessments
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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* nimhid
src_subject_id String 20 Required Subject ID how it's defined in lab/project id, ptid
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY Required field sessiondate
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. age, testagey
sex String 20 Required Sex of the subject M;F; O; NR M = Male; F = Female; O=Other; NR = Not reported gender, sexmf
Query days_baseline Integer Recommended Days since baseline daycpth, dayneuro
Query assbdic String 5 Recommended Assessment Point D;14;E;24;LB;36;72;96;120; 9; B; 3; 7; 144; 168;192; C D=MTA baseline assessment; 14=MTA 14 month assessment; E=MTA early termination assessment; B = MTA Pre-Baseline Screening Assessment (579/579); 09 = MTA 9 Month Assessment (530/530); 24=MTA 24 month assessment; LB=LNCG baseline assessment; 36=MTA and LNCG 3 year assessment; 72=MTA and LNCG 6 year assessment; 96=MTA and LNCG 8 year assessment; 03 = MTA 3 Month Assessment (438/687);120=MTA and LNCG 10 year assessment; 7= 7th Grade Assessment (221/276); 144 = MTA & LNCG 12 Month Assessment (578/578); 168 = MTA & LNCG 14 Month Assessment (585/585); 192 = MTA & LNCG 16 Month Assessment (505/505); C = MTA Pre-Baseline Screening Assessment (78/78) asscpth, assneuro
Query relationship Integer Recommended Relationship of respondent to individual
1 = Biological mom; 2 = Biological dad; 3 = Grandparent; 4 = Special education (sped) teacher; 5 = General education teacher; 6 = Occupational therapist; 7 = Speech and language therapist; 8 = Behavioral therapist; 9 = Paraprofessional; 10 = Aide; 11 = Principal; 12 = Administrator; 13 = 90=Other; 14 = Content teacher; 15 = Parent center director; 16 = Self; 17=Adoptive mother; 18=Adoptive father; 19=Foster mother; 20 = Foster father; 21=Grandmother; 22=Grandfather; 23=Step-mother; 24 = Step-father; 25=Aunt; 26=Uncle; 27=Missing Data; 28=Both parents;31= Grandmother from mother side; 32= Grandfather from mother side; 33= Grandmother from father side; 34= Grandfather from father side; 36= Brother; 37= Sister; 38= Cousin; 39= female caregiver; 40=male caregiver; 41=Female child; 42=Male child; 43=Spouse/Mate; 44=Friend; 45=Parent; 46=Significant other; 47=Sibling; 48=Son/Daughter; 49=Son-in-law/Daughter-in law; 50=Other Relative; 51=Paid caregiver; 52=Friends; 53=Roommate; 54=Supervisor; 55=mother's boyfriend; 56=other parental figure; 57=Summary; 58=counselor ; 59 = other female relative; 60 = other male relative; 61 = non-relative ; 62=Maternal Aunt; 63=Maternal Uncle; 64=Maternal Cousin; 65 = Paternal Aunt; 66=Paternal Uncle; 67=Paternal Cousin ; 68=Biological/Adoptive Mother and Grandmother; 69=Biological/Adoptive Mother and Stepmother and Grandmother; 70=Biological/Adoptive Mother and Grandmother and Foster Father; 71=Biological/Adoptive Mother and Stepmother and Foster Mother; 72=Biological/Adoptive Mother and Foster Mother; 73=Biological/Adoptive Mother and Biological/Adoptive Father; 74=Biological/Adoptive Mother and Stepmother and Biological/Adoptive Father; 75=Biological/Adoptive Mother and Other; 76=Biological/Adoptive Mother and Stepmother and Stepfather; 77=Biological/Adoptive Mother and Stepfather; 78=Biological/Adoptive Mother and Grandfather; 79=Biological/Adoptive Mother and Stepmother and Foster Father; 80=Biological/Adoptive Mother and Stepmother; 81=Guardian, female; 82=Other female; 83=Guardian, male; 84=Other male; 85=Other/Grandparent/Nanny; 86 = Mother, Father, Guardian; 87 = Daughter, son, grandchild; 88 = Professional (e.g., social worker, nurse, therapist, psychiatrist, or group home staff); -999=Missing; 89 = Biological parent; 91 = Stepparent; 92 = Adoptive parent; 93 = Foster parent relcpth, relneuro
Query actbdic Integer Recommended Active status 0::5 0=Inactive-Data collected after the 14 month treatment phase/after early termination from treatment phase/prior to treatment phase; 1=Active-Data collected during the 14 month treatment phase while subject received originally assigned treatment regardless of degree of compliance; 2=Active-This is the last active assessment for subjects who were about to violate treatment arm by receiving alternate treatment; 3=Active-This is the last active assessment for subjects who were about to leave the study by moving away;4=Yes, Active; 5=No, Not Active actcpth, actneuro
Query site String 101 Recommended Site Study Site sitenum
Query sjtyp Integer Recommended Subject type 1;2 1=MTA randomized trial subject; 2=Local normative comparison group (LNCG) subject
cpthtime String 20 Recommended Time tested HH:MM:SS
Query cpthth Float Recommended Total hits
Query cpthtfa Float Recommended Total false alarms
Query cpthtm Float Recommended Total misses
Query cpthtlc Float Recommended Total late corrects
Query cpthtrm Float Recommended Total Reaction Time Score (mean score) (in milliseconds)
Query cpthtrsd Float Recommended Total Reaction Time Score (standard deviation) (in milliseconds)
Query cpthtin Float Recommended Total Inattention Score
Query cpthtim Float Recommended Total Impulsivity Score
Query cpthtdy Float Recommended Total Dyscontrol Score
Query cpthe1h Float Recommended Epoch 1 Hits
Query cpthe2h Float Recommended Epoch 2 Hits
Query cpthe3h Float Recommended Epoch 3 Hits
Query cpthe4h Float Recommended Epoch 4 Hits
Query cpthe1fa Float Recommended Epoch 1 False Alarms
Query cpthe2fa Float Recommended Epoch 2 False Alarms
Query cpthe3fa Float Recommended Epoch 3 False Alarms
Query cpthe4fa Float Recommended Epoch 4 False Alarms
Query cpthe1rm Float Recommended Epoch 1 Reaction Time Score (mean score) (in milliseconds)
Query cpthe2rm Float Recommended Epoch 2 Reaction Time Score (mean score) (in milliseconds)
Query cpthe3rm Float Recommended Epoch 3 Reaction Time Score (mean score) (in milliseconds)
Query cpthe4rm Float Recommended Epoch 4 Reaction Time Score (mean score) (in milliseconds)
Query cpthe1rd Float Recommended Epoch 1 Reaction Time Score (standard deviation) (in milliseconds)
Query cpthe2rd Float Recommended Epoch 2 Reaction Time Score (standard deviation) (in milliseconds)
Query cpthe3rd Float Recommended Epoch 3 Reaction Time Score (standard deviation) (in milliseconds)
Query cpthe4rd Float Recommended Epoch 4 Reaction Time Score (standard deviation) (in milliseconds)
Query rtmean Float Recommended Mean Reaction Time stimdisplay1rt
Query rtsd Float Recommended Whole test - standard deviation of mean hit reaction time
Query rtvar Float Recommended Reaction Time Variance
Query rtcv Float Recommended Reaction Time Coefficient of Variation
Query acc Float Recommended Accuracy stimdisplay1acc
Query omiss Float Recommended Number of errors of omission
Query omisspct Float Recommended Percentage of errors of omission
Query comiss Float Recommended Number of errors of commission
Query comispct Float Recommended Percentage of errors of commission
Query mu Float Recommended Ex-Gaussian statistic MU
Query sigma Float Recommended Ex-Gaussian statistic SIGMA
Query tau Float Recommended Ex-Gaussian statistic TAU
Query np_cpt_test1_2dig_hits Integer Recommended Test 1 (2-digit) Hits 0::30
Query np_cpt_test1_2dig_fa Integer Recommended Test 1 (2-digit) False Alarms 0::30
Query np_cpt_test1_2dig_ran Integer Recommended Test 1 (2-digit) Randoms 0::90
Query np_cpt_test1_2dig_d Float Recommended Test 1 (2-digit) d-prime, discriminability
Query np_cpt_test2_3dig_hits Integer Recommended Test 2 (3-digit) Hits 0::30
Query np_cpt_test2_3dig_fa Integer Recommended Test 2 (3-digit) False Alarms 0::30
Query np_cpt_test2_3dig_ran Integer Recommended Test 2 (3-digit) Randoms 0::90
Query np_cpt_test2_3dig_d Float Recommended Test 2 (3-digit) d-prime, discriminability
Query np_cpt_test3_4dig_hits Integer Recommended Test 3 (4-digit) Hits 0::30
Query np_cpt_test3_4dig_fa Integer Recommended Test 3 (4-digit) False Alarms 0::30
Query np_cpt_test3_4dig_ran Integer Recommended Test 3 (4-digit) Randoms 0::90
Query np_cpt_test3_4dig_d Float Recommended Test 3 (4-digit) d-prime, discriminability
Query nc_omis Integer Recommended CPT number of Ommissions Score
Query nc_comm Integer Recommended CPT number of Commissions Score
Query nc_dp Float Recommended CPT d Prime Score
Query rand_num Integer Recommended Randomization Number 0::2
Query daysrz Integer Recommended days since randomization
Query week Float Recommended Week in level/study 99=week 10-week 14
subject_response String 10 Recommended Subject's response stimdisplay1resp
proceduretrial String 20 Recommended trial type procedureblock
stimulus_type String 50 Recommended Stimulus set (e.g. "tones") stimulustrial
Query hit Float Recommended True Positive cpt_hits
miss String 20 Recommended Miss cpt_miss
Query falsealarm Float Recommended False Alarm cpt_fa
Query delaytrial Integer Recommended time in milliseconds between end of previous stimulus and beginning of current stimulus.
Query cpt_mn_h Float Recommended Mean Response Time correct go
Query cpt_md_h Float Recommended Median Response Time correct go
Query cpt_sd_h Float Recommended Standard Deviation Response Time correct go
Query cpt_inh_cnt_750 Float Recommended Number of correct inhibited for delay=750
Query cpt_mn_h_750 Float Recommended Mean Response Time inhibition false alarms for when delay=750
Query cpt_md_h_750 Float Recommended Median Response Time inhib False when delay=750
Query cpt_sd_h_750 Float Recommended Standard Deviation Response Time inhibition false alarms delay=750
Query cpt_inh_cnt_1750 Float Recommended Number of correct inhibited for delay=1750
Query cpt_mn_h_1750 Float Recommended Mean Response Time inhibition false alarms for when delay=1750
Query cpt_md_h_1750 Float Recommended Median Response Time inhib False when delay=1750
Query cpt_sd_h_1750 Float Recommended Standard Deviation Response Time inhibition false alarms delay=1750
Query cpt_inh_cnt_3750 Float Recommended Number of correct inhibited for delay=3750
Query cpt_mn_h_3750 Float Recommended Mean Response Time inhibition false alarms for when delay=3750
Query cpt_md_h_3750 Float Recommended Median Response Time inhib False when delay=3750
Query cpt_sd_h_3750 Float Recommended Standard Deviation Response Time inhibition false alarms delay=3750
experiment_name String 200 Recommended Experiment Name experimentname
Query groups Integer Recommended Group 0;1 0=Control; 1=Case group
stime String 20 Recommended Session time sessiontime
Query block_number Integer Recommended Block Number block
Query trial Integer Recommended Trial number 0::400; -777; -999 1 = first; 2= second; 3=third; 4=fourth; 5=fifth; 6=sixth; etc; -777=NA, -999=missing
version_form String 121 Recommended Form used/assessment name
study String 100 Recommended Study
Query cptblocks Integer Recommended Number of Blocks Administered
Query cptrawscore Integer Recommended CPT Raw Score
Query cpttscore Integer Recommended CPT T-Score
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.