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Studies of Human Inference Using On-line Testing

StatusRecruiting
PhaseNot applicable
Started
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Record status
This record was last updated May 18, 2026 (before its estimated August 1, 2026 completion). Its status may not reflect the trial's current state.

Record History

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  1. Enrollment reduced: 1000 → 500 participants
    • Study completion pushed from Dec 2026 to Jun 30, 2028
    • Site contact updated
    v8
  2. Primary completion date: Aug 2026 to Aug 1, 2026
    • Study completion date: Dec 2026 to Jun 30, 2028
    v7
  3. Primary completion date: Nov 2025 to Aug 2026
    • Study completion date: Feb 2026 to Dec 2026
    • Collaborators: 2 to 1
    v6
  4. Primary completion date: Jun 2025 to Nov 2025
    • Study completion date: Jul 2025 to Feb 2026
    v5
  5. Trial status: Not Yet Recruiting to Recruitingv4 Show 4 more changesShow less
    • Primary completion date: Sep 2024 to Jun 2025
    • Start date changed from estimate of Jul 2024 to Feb 15, 2025
    • Study sites: 0 to 1
    • Study completion date: Oct 2024 to Jul 2025
Show 2 earlier versionsHide 2 earlier versions
  1. Start date: Feb 2024 to Jul 2024
    • Primary completion date: Apr 2024 to Sep 2024
    • Study completion date: Jun 2024 to Oct 2024
    v3
  2. Start date: Sep 2023 to Feb 2024
    • Primary completion date: Dec 2023 to Apr 2024
    • Study completion date: Mar 2024 to Jun 2024
    v2
  1. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
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.
Trial Details
NCT Number NCT05848752
Lead Sponsor University of Colorado, Boulder
Collaborators: University of Pennsylvania
Conditions
(from sponsor)		 Behavior
Related terms Behavior
Enrollment 500 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov