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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.

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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

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ABCD Little Man Task Part 2



Download Definition as
Download Submission Template as
Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*
src_subject_idString20RequiredSubject ID how it's defined in lab/projectlmt_subject_id
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired fieldlmt_scr_assess_date
interview_ageIntegerRequiredAge in months at the time of the interview/test/sampling/imaging.0 :: 1260Age 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.
genderString20RequiredSex of the subjectM;FM = Male; F = Female
visitString50RecommendedVisit nameCharacter description of each type of visitlmt_event_name
lmt_rt_82FloatRecommendedReaction time 82
lmt_stimulus_82String30RecommendedStimulus 82
lmt_button_pressed_82String30RecommendedButton Pressed 82
lmt_trial_type_82String30RecommendedTrial Type 82
lmt_trial_index_82String30RecommendedTrial Index 82
lmt_time_elapsed_82String30RecommendedTime Elapsed 82
lmt_internal_node_id_82String30RecommendedInternal Node ID 82
lmt_is_data_element_82String30RecommendedIs Data Element 82
lmt_stimulus_type_82String30RecommendedStimulus Type 82
lmt_correct_82IntegerRecommendedCorrect 82
lmt_skipped_82String30RecommendedSkipped 82
lmt_key_press_82String30RecommendedKey Press 82
lmt_rt_83FloatRecommendedReaction time 83
lmt_stimulus_83String30RecommendedStimulus 83
lmt_button_pressed_83String30RecommendedButton Pressed 83
lmt_trial_type_83String30RecommendedTrial Type 83
lmt_trial_index_83String30RecommendedTrial Index 83
lmt_time_elapsed_83String30RecommendedTime Elapsed 83
lmt_internal_node_id_83String30RecommendedInternal Node ID 83
lmt_is_data_element_83String30RecommendedIs Data Element 83
lmt_stimulus_type_83String30RecommendedStimulus Type 83
lmt_correct_83IntegerRecommendedCorrect 83
lmt_skipped_83String30RecommendedSkipped 83
lmt_key_press_83String30RecommendedKey Press 83
lmt_rt_84FloatRecommendedReaction time 84
lmt_stimulus_84String30RecommendedStimulus 84
lmt_button_pressed_84String30RecommendedButton Pressed 84
lmt_trial_type_84String30RecommendedTrial Type 84
lmt_trial_index_84String30RecommendedTrial Index 84
lmt_time_elapsed_84String30RecommendedTime Elapsed 84
lmt_internal_node_id_84String30RecommendedInternal Node ID 84
lmt_is_data_element_84String30RecommendedIs Data Element 84
lmt_stimulus_type_84String30RecommendedStimulus Type 84
lmt_correct_84IntegerRecommendedCorrect 84
lmt_skipped_84String30RecommendedSkipped 84
lmt_key_press_84String30RecommendedKey Press 84
lmt_scr_perc_correctFloatRecommendedPercentage correct of all 32 presented trials
lmt_scr_perc_wrongString30RecommendedPercentage wrong (including timed out) out of 32 trials.
lmt_scr_num_correctIntegerRecommendedNumber correct
lmt_scr_num_wrongString30RecommendedNumber wrong, not including timed out
lmt_scr_num_timed_outString30RecommendedNumber timed out due to lack of response
lmt_scr_avg_rtFloatRecommendedAverage reaction time for trials. Does not include timed out trials.
lmt_scr_rt_correctFloatRecommendedAverage reaction for correct trials
lmt_scr_rt_wrongFloatRecommendedAverage reaction for incorrect trials. Does not include timed out.
lmt_scr_efficiencyFloatRecommendedLMT EfficiencyPercentage correct divided by average reaction for correct trials
lmt_scr_correct_rt_stimtype1FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Backward Down Left)
lmt_scr_correct_rt_stimtype2FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Backward Down Right)
lmt_scr_correct_rt_stimtype3FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Backward Up Left)
lmt_scr_correct_rt_stimtype4FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Backward Up Right)
lmt_scr_correct_rt_stimtype5FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Forward Down Left)
lmt_scr_correct_rt_stimtype6FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Forward Down Right)
lmt_scr_correct_rt_stimtype7FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Forward Up Left)
lmt_scr_correct_rt_stimtype8FloatRecommendedLatency (msec) for Correct Per Stimulus Type (Forward Up Right)
lmt_scr_correct_num_stimtype1IntegerRecommendedCount Number Correct Per Stimulus Type (Backward Down Left)
lmt_scr_correct_num_stimtype2IntegerRecommendedCount Number Correct Per Stimulus Type (Backward Down Right)
lmt_scr_correct_num_stimtype3IntegerRecommendedCount Number Correct Per Stimulus Type (Backward Up Left)
lmt_scr_correct_num_stimtype4IntegerRecommendedCount Number Correct Per Stimulus Type (Backward Up Right)
lmt_scr_correct_num_stimtype5IntegerRecommendedCount Number Correct Per Stimulus Type (Forward Down Left)
lmt_scr_correct_num_stimtype6IntegerRecommendedCount Number Correct Per Stimulus Type (Forward Down Right)
lmt_scr_correct_num_stimtype7IntegerRecommendedCount Number Correct Per Stimulus Type (Forward Up Left)
lmt_scr_correct_num_stimtype8IntegerRecommendedCount Number Correct Per Stimulus Type (Forward Up Right)
lmt_scr_wrong_rt_stimtype1FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Backward Down Left)
lmt_scr_wrong_rt_stimtype2FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Backward Down Right)
lmt_scr_wrong_rt_stimtype3FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Backward Up Left)
lmt_scr_wrong_rt_stimtype4FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Backward Up Right)
lmt_scr_wrong_rt_stimtype5FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Forward Down Left)
lmt_scr_wrong_rt_stimtype6FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Forward Down Right)
lmt_scr_wrong_rt_stimtype7FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Forward Up Left)
lmt_scr_wrong_rt_stimtype8FloatRecommendedLatency (msec) for Wrong Per Stimulus Type (Forward Up Right)
lmt_scr_wrong_num_stimtype1IntegerRecommendedCount Number Wrong Per Stimulus Type (Backward Down Left)
lmt_scr_wrong_num_stimtype2IntegerRecommendedCount Number Wrong Per Stimulus Type (Backward Down Right)
lmt_scr_wrong_num_stimtype3IntegerRecommendedCount Number Wrong Per Stimulus Type (Backward Up Left)
lmt_scr_wrong_num_stimtype4IntegerRecommendedCount Number Wrong Per Stimulus Type (Backward Up Right)
lmt_scr_wrong_num_stimtype5IntegerRecommendedCount Number Wrong Per Stimulus Type (Forward Down Left)
lmt_scr_wrong_num_stimtype6IntegerRecommendedCount Number Wrong Per Stimulus Type (Forward Down Right)
lmt_scr_wrong_num_stimtype7IntegerRecommendedCount Number Wrong Per Stimulus Type (Forward Up Left)
lmt_scr_wrong_num_stimtype8IntegerRecommendedCount Number Wrong Per Stimulus Type (Forward Up Right)
lmt_scr_tout_num_stimtype1IntegerRecommendedCount Number Timed Out Per Stimulus Type (Backward Down Left)
lmt_scr_tout_num_stimtype2IntegerRecommendedCount Number Timed Out Per Stimulus Type (Backward Down Right)
lmt_scr_tout_num_stimtype3IntegerRecommendedCount Number Timed Out Per Stimulus Type (Backward Up Left)
lmt_scr_tout_num_stimtype4IntegerRecommendedCount Number Timed Out Per Stimulus Type (Backward Up Right)
lmt_scr_tout_num_stimtype5IntegerRecommendedCount Number Timed Out Per Stimulus Type (Forward Down Left)
lmt_scr_tout_num_stimtype6IntegerRecommendedCount Number Timed Out Per Stimulus Type (Forward Down Right)
lmt_scr_tout_num_stimtype7IntegerRecommendedCount Number Timed Out Per Stimulus Type (Forward Up Left)
lmt_scr_tout_num_stimtype8IntegerRecommendedCount Number Timed Out Per Stimulus Type (Forward Up Right)
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.

Distribution for DataStructure: lmtp201 and Element:
Chart Help

Filters enable researchers to view the data shared in NDA before applying for access or for selecting specific data for download or NDA Study assignment. For those with access to NDA shared data, you may select specific values to be included by selecting an individual bar chart item or by selecting a range of values (e.g. interview_age) using the "Add Range" button. Note that not all elements have appropriately distinct values like comments and subjectkey and are not available for filtering. Additionally, item level detail is not always provided by the research community as indicated by the number of null values given.

Filters for multiple data elements within a structure are supported. Selections across multiple data structures will be supported in a future version of NDA.