Studies of Human Inference Using On-line Testing
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: psychophysics.
- Who it may be relevant to
- Registry conditions: Behavior. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- United States
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
The investigators will record behavioral responses from human participants on crowdsourcing platform Prolific to identify the decision strategies humans apply short-term, long-term, and multi timescale (across both timescales) inference tasks. Participants will perform a flexible decision-making task (described in Research Strategy Aim 1) in which subjects must determine which of two locations a series of evidence (package drops) came from. Subjects must 1) report the current location, 2) predict the next location. The investigators will record these responses, the number (and sequence) of evidence, and the response time (time from the end of trial until the response) for each trial. Subjects will perform all blocks (parameters and number of blocks to be determined by inference model development and testing prior to task development) so that we can compare responses at each timescale. Since participants participate voluntarily for small sums of money (around $12/ hour based on duration of task) and the investigators' previous studies have collected over 200 subjects in a matter of days, they will aim to record behavioral data from 1000 subjects. This number allows them to address the broad range of subject variability expected using Bayesian statistical methods such as Bayes factors.
Interventions
- Behavioral psychophysics
Subjects will be shown two locations and a series of package drops that switch between the two locations with an unknown frequency. Subjects must identify which location is current in use and which location will be selected next. Subjects know that the frequency of the location changes is different in each block but not its exact value
Primary outcome measures
- Binary Behavioral Decision Responses [Time frame: Through task completion on each task trial, approximately 1-5x/ minute for approximate 30 minutes]
Eligibility criteria
Inclusion criteria
- Adult Prolific participants who have a 95% approval rating and achieve a minimum score of 80% on our pre-test,
- Speak fluent English
- Are in the US.
Exclusion criteria
- None
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Allocation
- N/A
- Model
- Single group
- Masking
- Open label
- Primary purpose
- Basic science
Study locations
United States · 1 center
- University of Colorado Boulder — Boulder
Identifiers
NCT: NCT05848752 · 25-2034