Trial-to-trial, uncertainty-based adjustment of decision boundaries in visual categorization.
نویسندگان
چکیده
Categorization is a cornerstone of perception and cognition. Computationally, categorization amounts to applying decision boundaries in the space of stimulus features. We designed a visual categorization task in which optimal performance requires observers to incorporate trial-to-trial knowledge of the level of sensory uncertainty when setting their decision boundaries. We found that humans and monkeys did adjust their decision boundaries from trial to trial as the level of sensory noise varied, with some subjects performing near optimally. We constructed a neural network that implements uncertainty-based, near-optimal adjustment of decision boundaries. Divisive normalization emerges automatically as a key neural operation in this network. Our results offer an integrated computational and mechanistic framework for categorization under uncertainty.
منابع مشابه
A decision making model for outsourcing of manufacturing activities by ANP and DEMATEL under fuzzy environment
Decision making about outsourcing or insourcing of manufacturing activities is a type of multiple criteria decision making (MCDM) problem, which requires considering quantitative and qualitative factors as evaluation criteria simultaneously. Therefore, a suitable MCDM method can be useful in this area as it can consider the interactions among quantitative and qualitative criteria. The analytic...
متن کاملVisual Category Learning Results in Rapid Changes in Brain Activation Reflecting Sensitivity to the Category Relation between Perceived Objects and to Decision Correctness
Little is known about the time scales in which sensitivity to novel category identity may become evident in visual and executive cortices in visual category learning (VCL) tasks and the nature of such changes in brain activation. We used fMRI to investigate the processing of category information and trial-by-trial feedback information. In each VCL task, stimuli differed in three feature dimensi...
متن کاملComparison of the effectiveness of mindfulness based on stress reduction therapy and neurofeedback training on the clinical symptoms of individual with generalized anxiety disorder: A clinical trial study
Background and Objective: Generalized anxiety disorder is a prevalent, chronic and disabling mental disorder. This study was done to compare the effectiveness of mindfulness based on stress reduction therapy and neurofeedback training on the clinical symptoms of individual with generalized anxiety disorder. Methods: This clinical trial study, was done on 20 individual with generalized anxiety ...
متن کاملStarting Position Target Position Visual Feedback Actual Hand Position 15 cm B D C A Feedback Uncertainty Small Blur Large Blur
models make specific predictions about the role of feedback and state estimation uncertainty in estimating movement-related vari-For example, when playing tennis we might observe that we return the ball short of an intended location. We will then adapt our next swing to this error. To optimally perform the task, we will adapt more if we clearly see the error as compared to if we only see it thr...
متن کاملEffects of the Presence of the Doula on Pregnant Women\'s Anxiety and Pain During Delivery: A Randomized Controlled Trial
Background & Objective: Based on the cultural and structural boundaries in Iran in terms of the presence of doulas through the delivery, the importance of making the delivery more desirable for mothers, and since few important studies have been conducted on this topic in Iran, this study evaluated the effects of the presence of a doula on anxiety and pain in pregnant women during delivery. ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Proceedings of the National Academy of Sciences of the United States of America
دوره 110 50 شماره
صفحات -
تاریخ انتشار 2013