Prevalence Effects in Visual Search: Theoretical and Practical Implications (J)
Brigham and Women's Hospital
Summary
The goal is to look for qualitative differences in visual search behavior when one search is performed many times in a row compared to when multiple search tasks are intermixed. Four search tasks are tested. The target is the same in every task but the types of distractors change from task to task. In this version, observers get some degree of choice in what they are searching.
Description
NOTE: This registration is linked to a Human Subjects registration in ASSIST. That, in turn, is part of an NCI Grant, R01EY017001. The grant describes many proposed experiments and notes that many others might be done as follow-up studies. At the suggestion of the NIH, the investigators grouped these studies into several "studies", each covering multiple experiments. The experiment described here is part of Aim 1 of R01EY017001. It is not possible to register a set of experiments through the PRS system in CT.gov and it is not possible to file an annual report for the grant (RPPR) without an NC…
Eligibility
- Age range
- 18+ years
- Sex
- All
- Healthy volunteers
- Yes
Inclusion Criteria: • Pass Ishihara color vision test Exclusion Criteria: • vision less than 20/25 with correction \- history of neuromuscular or visual disorders
Interventions
- BehavioralChoice
The observer gets to make a choice about the sequence of trials they see
- BehavioralMixed trials
The search tasks are either intermixed. Otherwise trials are run in blocks
Location
- Brigham & Women's HospitalBoston, Massachusetts