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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).

When combining other filters with the GUID filter, please note the GUID filter should be added last. Otherwise, preselected data may be lost. For example, a predefined filter from Featured Datasets may select a subset of data available for a subject. When combined with a GUID filter for the same subject, the filter cart will contain all data available from that subject, data structure, and dataset; this may be more data than was selected in the predefined filter for that subject. Again, you should add the GUID Filter as the last filter to your cart. This ensures 'AND' logic between filters and will limit results to the subjects, data structures, and datasets already included in your filter cart.

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.

    When combining other filters with the GUID filter, please note the GUID filter should be added last. Otherwise, preselected data may be lost. For example, a predefined filter from Featured Datasets may select a subset of data available for a subject. When combined with a GUID filter for the same subject, the filter cart will contain all data available from that subject, data structure, and dataset; this may be more data than was selected in the predefined filter for that subject. Again, you should add the GUID Filter as the last filter to your cart. This ensures 'AND' logic between filters and will limit results to the subjects, data structures, and datasets already included in your filter cart.

  • 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. 


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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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Delusion Assessment Scale

259 Shared Subjects

Clinical Assessments
View Change History
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 subjid
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY
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 subject at birth M;F; O; NR M = Male; F = Female; O=Other; NR = Not reported gender
Query rods Integer Recommended RESOLUTION OF DELUSIONS 1::5 1 = Delusional belief is not present currently. Patient is able to recognize that the delusional belief present earlier in the episode was false and/or was a result of a mental illness. (Skip out; no need to administer remainder of DAS.);2 = Delusional belief is not present currently. Patient is able to recognize that the delusional belief present earlier in the episode may have been false and/or may have been the result of a mental illness. (Administer entire scale based on partially resolved delusion.);3 = Delusional belief is not present currently. Patient has near certainty that the delusional belief present earlier in the episode was true; any doubts are only transient. (Administer entire scale based on partially resolved delusion.) 4 = Delusional belief is not present currently. Patient has unwavering conviction that the delusional belief present earlier in the episode was true. (Administer entire scale based on partially resolved delusion.) 5 = Delusional belief is present currently. (Complete entire scale.)
Query das_1 Integer Recommended A. CONVICTION: I. Subjective Feeling Of Certainty (rated based on self-report as expressed during interview) 1::3 1 = Ability to offer doubt about belief (e.g., acknowledgement that belief could be the result of an illness) although unwilling to fully dismiss belief as inaccurate);2 = Near certainty the belief is true; any doubts are only transient;3 = Absolute and unwavering conviction das1
Query das_2 Integer Recommended A. CONVICTION: II. Acting On The Belief (rated using historical information and explanation of previous behavior to interviewer; also assesses whether judgment is affected by belief) 1::3 1 = Belief does not influence actions;2 = Acts or has acted on the belief, but such actions do not have significant consequences such as impairing functioning and or affecting others (e.g., acting suspiciously towards hospital staff; changing locks on doors, repeated visits to physicians because of a somatic preoccupation, complaining to police about neighbors);3 = Actions demonstrate markedly impaired judgment; actions have a significant impact on the patient's life with adverse consequences to the patient or others (e;g;, acts that directly resulted in hospitalization, such as refusing to eat or making a suicide attempt) das2
Query das_3 Integer Recommended A. CONVICTION: III. Acting Irrationally Towards Interviewer (rated based on interviewer's observations, including responses to attempts to clarify and to confrontation) 1::3 1 = Not distrustful towards interviewer;2 = Distrustful as in questioning motives of interviewer (e;g;, refusal to provide clinician with any personal information or asking to be discharged without treatment because no illness is present;3 = Refusal to answer even the simplest personal questions or is mute das3
Query das_4 Integer Recommended A. CONVICTION: IV. Accommodation (observer's assessment of responses to confrontation and reality testing by interviewer, in contrast to item I which assesses subjective level of conviction) 1::3 1 = Confrontation leads to modification of belief;2 = Confrontation leads to consideration of alternative explanations or modification of some aspects of the belief, but central belief is unchanged;3 = Confrontation has no effect on the belief and does not lead to consideration of alternative explanations das4
Query das_5 Integer Recommended B. EXTENSION: V. People And Objects Involved 1::3 1 = The number of objects involved is discrete (e.g., diseased organ(s) in the case of somatic delusions, organizations and their employees, e.g., FBI, next door neighbors, a specific doctor's staff or a specific phone is tapped);2 = The number of people or organizations involved cannot be defined clearly but appears to be limited by identifiable characteristics and can be organized around a central theme (e.g. belief colleagues at work are conspiring against the individual and may have enlisted others);3 = Rater is unable to obtain a clear and complete description of the delusion; there are no defining characteristics that limit the number of individuals or organizations involved in the belief; For somatic delusions the organs or diseases that are the focus of the concerns cannot be identified das5
Query das_6 Integer Recommended B. EXTENSION: VI. Places/Situations In Which The Delusional Idea Is Prominent 1::3 1 = Delusional ideation is limited to a single context/place (e.g., work/home/ traveling in a subway); Paranoia is limited to home or work but does not involve hospital; Because the patient brings his/her physical self into different settings, a circumscribed somatic delusion is rated as 1;2 = The delusional ideas occur in multiple contexts or places that have common identifiable characteristics (e;g;, the neighborhood, hospital and other locations consistent with a specific delusional theme such as persecution based on ethnicity);3 = There are no defining characteristics that limit places/situations that may be involved in the beliefs das6
Query das_7 Integer Recommended C. BIZARRENESS: VII. Distortion Of Consensual Reality (Implausibility) 1::3 1 = May be considered an extreme value judgment or remote possibility but is not patently absurd because of physical impossibility (e.g., somatic delusion of having a cancer or paranoid delusion of being followed);2 = Content of belief is obviously implausible but is not physically impossible (e.g., somatic delusion of having been poisoned by persecutor, of being the victim of conspiracy by coworkers to cause termination of employment, or a paranoid delusion that a neighbor is tapping the telephone or has hacked into the patient's computer);3 = Belief is patently absurd and physically impossible (e;g;, delusions of thoughts being withdrawn or inserted electronically or being monitored by satellite) das7
Query das_8 Integer Recommended C. BIZARRENESS: VIII. Relationship To Cultural Context 1::3 1 = Belief is consistent with patient's cultural background and could be seen as plausible by individuals of the same background (e;g;, conviction of persecution that is based on race or gender);2 = Although members of the culture would not accept the belief as plausible, the belief is directly related to the cultural context (e;g;, patient believes he has been singled out for persecution to set an example for all members of his race/religion or because of being chosen for a special mission by God);3 = Belief is entirely deviant from those held by members of patient's culture; (e;g;, belief that one has been chosen to colonize space for his race) das8
Query das_9 Integer Recommended D. DISORGANIZATION: IX. Internal Consistency (ratings based upon interview) 1::3 1 = Single or multiple beliefs are clearly connected to the principal delusional idea or a single theme (e.g., guilty, hopeless and deserves to be punished because of a long-past sexual indiscretion);2 = Multiple delusional ideas are present that are related to a central theme; However, the ideas involve more than one false assumption and are not clearly connected (e.g., patient will be punished by Internal Revenue Service for taking an extra tax exemption 20 years ago and neighbors are now spying and monitoring behavior for the police);3 = Multiple delusional ideas that cannot be connected to a single theme (e;g;, delusions of being persecuted without apparent reason, of having sexual organs removed and of receiving telepathic messages) das9
Query das_10 Integer Recommended D. DISORGANIZATION: X. Cognitive Integration (rated based upon interview) 1::3 1 = Patient can explain how multiple delusional ideas are connected to a single primary belief or has a single delusion that tells a cohesive story;2 = There are multiple parts to a single delusional idea, or multiple delusional ideas, that the patient attempts to integrate but cannot explain cohesively how multiple ideas are connected;3 = Patient recognizes the lack of relationship of multiple delusional ideas with a single theme or a principal belief, and either cannot or will not provide an explanation das10
Query das_11 Integer Recommended D. DISORGANIZATION: XI. Temporal Continuity of the Most Prominent Delusion(s) (Rated using historical information but based on assessment during interview) 1::3 1 = The same delusional idea or ideas has/have been held consistently during an episode of illness without the addition of new ideas;2 = During the current episode or the interview, there has been one consistently held prominent delusional idea, but some modification has occurred or another delusion has developed; Additional transient ideas may have developed or resolved;3 = The content of the most prominent delusion has changed significantly during the episode of illness or has been replaced by a different delusion (e.g., a fear of being followed in the neighborhood has become a fear of being poisoned by another patient) das11
Query das_12 Integer Recommended E. PRESSURE: XII. Temporal Pressure (rated using observations, including those of others) 1::3 1 = Most of the day is spent without being concerned about the belief;2 = Preoccupied with the belief enough of the day to interfere with the completion of tasks such as routine chores or work;3 = Preoccupation with the belief is nearly constant and interferes with completion of all or nearly all simple responsibilities das12
Query das_13 Integer Recommended E. PRESSURE: XIII. Temporal Pressure During Interview (rated based on interview) 1::3 1 = Thoughts of the belief do not intrude during the interview and engagement in extended discussion of other topics is possible;2 = The belief or related ideas intrude into the interview, but distraction to other topics is possible;3 = The belief or related thoughts repeatedly interrupt the interview and engagement in discussion of other topics for more than a few moments or sentences is not feasible das13
Query das_14 Integer Recommended E. PRESSURE: XIV. Emotional Pressure (rated primarily through interview but can incorporate observations of others) 1::3 1 = Belief does not cause obvious affective distress or concern;2 = Discussion of belief causes subjective or objective emotional distress (e;g;, anxiety or depression);3 = Discussion of belief causes marked distress leading to intense expressions of affect (e;g;, pronounced fear, overt crying or fearfulness) das14
Query das_16 Integer Recommended E. PRESSURE: XV. CONGRUENCE Rate the most prominent delusion only. Extent to which delusional belief is consistent with the disturbance of mood 1::3 1 = There is no relationship between delusional belief and a mood disturbance (e;g;, a paranoid delusional in which the patient believes persecution is unjust and is not due to a personal misdeed or negative attribute);2 = The delusional belief is consistent with the theme of the mood disturbance through an identified personal failing on the part of the patient, but the connection is tenuous (paranoid delusion about conspiracy to terminate job because performance has been impaired during depression; paranoid delusion that children are stealing money because patient has been unavailable to grandchildren);3 = Delusions of guilt, hopeless or nihilism; somatic delusions (by convention); paranoid delusion in which persecution is attributed to a real or imagined personal misdeed; belief that current depression is untreatable and that patient will require life-long state hospitalization das16
Query das_impact Integer Recommended Impact factor Sum of Items 2,3,12,13,14 - not scored if any are missing
Query das_disorg Integer Recommended Disorganization factor Sum of Items 9,10,11 - not scored if any are missing
Query das_convict Integer Recommended Conviction factor Sum of Items 1,4 - not scored if any are missing
Query das_bizzare Integer Recommended Bizarreness factor Sum of Items 7,8 - not scored if any are missing
Query das_extension Integer Recommended Extension factor Sum of Items 5,6 - not scored if any are missing
Query site String 101 Recommended Site Study Site
Query week Float Recommended Week in level/study 99=week 10-week 14 intid
Query study_id Integer Recommended Study ID number 46=Acute Phase; 47=Stabilization Phase
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.