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Gain/Loss Task

0 Shared Subjects

A 2-armed bandit task in which 2 of 3 stimuli with stable win probabilities are sampled on each trial. These probabilities may be interchanged once or twice per block. [https://doi.org/10.1371/journal.pbio.0040233]
Clinical Assessments
Task Based
12/11/2020
gloss01
01/13/2021
View Change History
01
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
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
experiment_id Integer Recommended ID for the Experiment/settings/run
trialnum Integer Recommended Number of trial within entire task
condid Integer Recommended Is the block a gain block or a loss block? ( Gain block: subjects wins 25 points for winning and 0 for losing, Loss block: subject loses 25 points for losing and 0 points for winning) 1;-1 1 = Gain; -1 = Loss
pwin_1 Float Recommended Probability of stimulus 1 resulting in a win 0::1 Probability must be decimal value.
pwin_2 Float Recommended Probability of stimulus 2 resulting in a win 0::1 Probability must be decimal value.
pwin_3 Float Recommended Probability of stimulus 3 resulting in a win 0::1 Probability must be decimal value.
iswin_1 Integer Recommended Did stimulus 1 result in a win? 0;1 0 = No; 1 = Yes
iswin_2 Integer Recommended Did stimulus 2 result in a win? 0;1 0 = No; 1 = Yes
iswin_3 Integer Recommended Did stimulus 3 result in a win? 0;1 0 = No; 1 = Yes
sampleoutcome_1 Integer Recommended Number of points earned if stimulus 1 is selected -50;-25;0;25 Possible values are 0 and 25 in Gain blocks, and -25 and 0 in Loss blocks. Missed trials are -50 points.
sampleoutcome_2 Integer Recommended Number of points earned if stimulus 2 is selected -50;-25;0;25 Possible values are 0 and 25 in Gain blocks, and -25 and 0 in Loss blocks. Missed trials are -50 points.
sampleoutcome_3 Integer Recommended Number of points earned if stimulus 3 is selected -50;-25;0;25 Possible values are 0 and 25 in Gain blocks, and -25 and 0 in Loss blocks. Missed trials are -50 points.
stimindex_1 Integer Recommended Index of left stimulus, sampled from set of 3 stimuli available during current block 1::3 1 = stimulus 1 selected; 2 = stimulus 2 selected; 3 = stimulus 3 selected
stimindex_2 Integer Recommended Index of right stimulus, sampled from set of 3 stimuli available during current block 1::3 1 = stimulus 1 selected; 2 = stimulus 2 selected; 3 = stimulus 3 selected
stimid_1 Integer Recommended ID of left stimulus in the set of all stimuli shown during the task
stimid_2 Integer Recommended ID of right stimulus in the set of all stimuli shown during the task
resp_01 Integer Recommended Gain/Loss Task - Subject's response 1;2;-999 1 = Left; 2 = Right; -999 = Miss (subject took longer than 2s to respond) resp
selectstimid Integer Recommended ID of selected stimulus in the set of all stimuli shown during the task, indexed from 1 NaN indicates missed response (subject took longer than 2s)
selectstimindex Integer Recommended Index of selected stimulus in the set of 3 stimuli available during current block, indexed from 1 1::3;-999 1 = stimulus 1 selected; 2 = stimulus 2 selected; 3 = stimulus 3 selected; -999 indicates missed response (subject took longer than 2s)
iscorrect Integer Recommended Indicates whether selected stimulus had the higher win probability of the two stimuli shown 0;1;-999 0 = False, 1 = True. -999 indicates missed response (subject took longer than 2s)
outcomewin Integer Recommended Indicates whether selected stimulus resulted in a win 0;1;-999 0 = False, 1 = True. -999 indicates missed response (subject took longer than 2s)
outcomerew Integer Recommended Number of points earned by subject response -50;-25;0;25 Possible values are 0 and 25 in Gain blocks, and -25 and 0 in Loss blocks. Missed trials are -50 points.
rt_01 Float Recommended Time elapsed between stimulus onset and subject reponse In milliseconds. -999 indicates missed response (subject took longer than 2s) rt
sessionid1 Integer Recommended ID for session For in-lab subjects, sessionID corresponds to the visit number. For online subjects, sessionID = 1 sessionid
practice1 Integer Recommended Is the trial a practice trial? 0;1 0 = main task; 1 = practice practice
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:

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