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Studies of Human Inference Using On-line Testing

Studies of Human Inference Using On-line Testing

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05848752
Enrollment
500
Registered
2023-05-08
Start date
2025-02-15
Completion date
2028-06-30
Last updated
2026-05-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Behavior

Brief summary

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

BEHAVIORALpsychophysics

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

Sponsors

University of Colorado, Boulder
Lead SponsorOTHER
University of Pennsylvania
CollaboratorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

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

Design outcomes

Primary

MeasureTime frameDescription
Binary Behavioral Decision ResponsesThrough task completion on each task trial, approximately 1-5x/ minute for approximate 30 minutesSubject- provided choices (responses on the computer) between two presented options

Countries

United States

Contacts

CONTACTTahra Eissa
tahra.eissa@colorado.edu(303) 492-6974
PRINCIPAL_INVESTIGATORTahra Eissa

University of Colorado, Denver

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 19, 2026