Studies of Human Inference Using On-line Testing

Part of paid clinical trials in Boulder, Colorado.

Sponsor
University of Colorado, Boulder
Study ID
NCT05848752
Status
Recruiting
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Conditions

  • Behavior

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Accepted

Interventions

  • psychophysics — BEHAVIORAL
    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

Study Details

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.

Key Dates

Start date
Feb 15, 2025
Status verified
May 2026
Primary completion
Aug 1, 2026
Completion
Jun 30, 2028

Study Design

Enrollment
500 participants (estimated)
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE

Arms

  • Experimental: Environmental Feature Experiment

Primary Outcome Measure

Binary Behavioral Decision Responses [ Time Frame: Through task completion on each task trial, approximately 1-5x/ minute for approximate 30 minutes ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
University of Colorado BoulderBoulderColorado80309
Tahra Eissa
[email protected]
303-492-6974

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University of Colorado Boulder· Boulder, CO

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