Publications by authors named "Hillary S Wehe"
Neural networks supporting switching, hypothesis testing, and rule application.
Neuropsychologia
October 2015
Article Synopsis
- The study investigated changes in neural connectivity during a flexible rule learning task similar to the Wisconsin Card Sort Task, focusing on three phases: switching, hypothesis testing, and rule application.
- During fMRI scanning, subjects were tasked with selecting stimuli based on learned rules and were prompted to switch rules through cueing methods such as negative feedback.
- Results showed that switching was linked to a limbic network involving regions like the ventral striatum and thalamus, while hypothesis testing activated a broader fronto-parietal network that correlated with learning speed.
Evidence for the negative impact of reward on self-regulated learning.
Q J Exp Psychol (Hove)
April 2016
The undermining effect refers to the detrimental impact rewards can have on intrinsic motivation to engage in a behaviour. The current study tested the hypothesis that participants' self-regulated learning behaviours are susceptible to the undermining effect. Participants were assigned to learn a set of Swahili-English word pairs.
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- Effective generalization in categorization involves understanding individual categories and resolving conflicts, utilizing decision bounds in tasks where stimuli vary across different features.
- fMRI scans revealed that categorization involves brain areas such as the extrastriate visual cortex and basal ganglia, while decision conflicts activate regions like the frontoinsular cortex.
- The study distinguishes between types of uncertainty—representational uncertainty related to category membership and decisional uncertainty linked to the decision bound—indicating that different neural mechanisms are at play for each type.