scholarly journals Challenging the role of implicit processes in probabilistic category learning

2007 ◽  
Vol 14 (3) ◽  
pp. 505-511 ◽  
Author(s):  
Ben R. Newell ◽  
David A. Lagnado ◽  
David R. Shanks
Keyword(s):  
Category Learning ◽  
Implicit Processes

scholarly journals Left Inferior Frontal Gyrus Integrates Multisensory Information in Category Learning

2020 ◽  
Vol 30 (8) ◽  
pp. 4410-4423
Author(s):  
You Li ◽  
Carol Seger ◽  
Qi Chen ◽  
Lei Mo
Keyword(s):  
Category Learning ◽  
Information Integration ◽  
Multisensory Processing ◽  
Inferior Frontal Gyrus ◽  
Sensory Modality ◽  
Precentral Gyrus ◽  
General Network ◽  
Multisensory Information ◽  
First Time

Abstract Humans are able to categorize things they encounter in the world (e.g., a cat) by integrating multisensory information from the auditory and visual modalities with ease and speed. However, how the brain learns multisensory categories remains elusive. The present study used functional magnetic resonance imaging to investigate, for the first time, the neural mechanisms underpinning multisensory information-integration (II) category learning. A sensory-modality-general network, including the left insula, right inferior frontal gyrus (IFG), supplementary motor area, left precentral gyrus, bilateral parietal cortex, and right caudate and globus pallidus, was recruited for II categorization, regardless of whether the information came from a single modality or from multiple modalities. Putamen activity was higher in correct categorization than incorrect categorization. Critically, the left IFG and left body and tail of the caudate were activated in multisensory II categorization but not in unisensory II categorization, which suggests this network plays a specific role in integrating multisensory information during category learning. The present results extend our understanding of the role of the left IFG in multisensory processing from the linguistic domain to a broader role in audiovisual learning.

scholarly journals Predicting Contamination Aversion Using Implicit and Explicit Measures of Disgust and Threat Overestimation

2018 ◽  
Vol 35 (1) ◽  
pp. 22-38 ◽  
Author(s):  
Melissa Rouel ◽  
Richard J. Stevenson ◽  
Evelyn Smith
Keyword(s):  
Implicit Measures ◽  
Obsessive Compulsive ◽  
Implicit Processes ◽  
Contamination Fear ◽  
Harmful Substances ◽  
Implicit And Explicit ◽  
Explicit Measures

Explicit measures of disgust and threat overestimation have consistently been found to be involved in contamination aversion. However, evidence of the involvement of these factors at the implicit level is mixed, and the role of both responses has not been looked at concurrently. This study aimed to compare the ability of implicit and explicit measures of disgust and threat overestimation to predict contamination aversion and whether this depends on the type of contaminant. Sixty-five participants completed explicit and implicit measures of disgust and threat overestimation, as well as several measures of contamination aversion, including obsessive-compulsive tendencies, and contamination fear and avoidance of contaminants directly associated with disease (direct contaminants) and harmful substances (harm contaminants). It was found that both explicit disgust and explicit threat overestimation predicted contamination-fear obsessive-compulsive tendencies. Explicit disgust predicted contamination fear and avoidance of direct contaminants, whereas explicit threat overestimation predicted contamination fear and avoidance of harm contaminants. The involvement of implicit processes was weak, with some suggestion of difficulty disengaging predicting avoidance of contaminants. Implications for understanding dysfunctional contamination aversion are discussed.

The role of age and executive function in auditory category learning

2015 ◽  
Vol 137 (4) ◽  
pp. 2208-2209
Author(s):  
Rachel Reetzke ◽  
Todd Maddox ◽  
Bharath Chandrasekaran
Keyword(s):  
Executive Function ◽  
Category Learning

scholarly journals Tests of a dual-system model of speech category learning

2014 ◽  
Vol 17 (4) ◽  
pp. 709-728 ◽  
Author(s):  
W. TODD MADDOX ◽  
BHARATH CHANDRASEKARAN
Keyword(s):  
Category Learning ◽  
Native Speakers ◽  
American English ◽  
Dual System ◽  
Learning Systems ◽  
Practice Transfer ◽  
Mandarin Tones ◽  
Visual Domain ◽  
Speech Learning

In the visual domain, more than two decades of work has argued for the existence of dual category learning systems. Thereflectivesystem uses working memory in an explicit fashion to develop and test rules for classifying. Thereflexivesystem operates by implicitly associating perception with actions that lead to reinforcement. Dual-system models posit that in learning natural categories, learners initially use the reflective system and with practice, transfer control to the reflexive system. The role of reflective and reflexive systems in second language (L2) speech learning has not been systematically examined. In the study reported in this paper, monolingual native speakers of American English were trained to categorize Mandarin tones produced by multiple speakers. Our computational modeling approach demonstrates that learners use reflective and reflexive strategies during tone category learning. Successful learners use speaker-dependent, reflective analysis early in training and reflexive strategies by the end of training. Our results demonstrate that dual-learning systems are operative in L2 speech learning. Critically, learner strategies directly relate to individual differences in successful category learning.

scholarly journals White civilians’ implicit danger evaluation of police officers underlies explicit perception of police

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Vincenzo J. Olivett ◽  
David S. March
Keyword(s):  
Police Officers ◽  
Racial Bias ◽  
Police Reform ◽  
Implicit Processes ◽  
Explicit Attitudes ◽  
Perception Of Threat ◽  
Within Subjects ◽  
Perception Of Police ◽  
And Behavior

AbstractThe role of implicit processes during police-civilian encounters is well studied from the perspective of the police. Decades of research on the “shooter bias” suggests that implicit Black-danger associations potentiate the perception of threat of Black individuals, leading to a racial bias in the decision to use lethal force. Left understudied are civilians’ possible associations of police with danger and how such associations pervade behavior and explicit views of the police. The current work begins to address this gap. In two within-subjects studies, we separately assess police-threat (i.e., safety/danger) and police-valence (i.e., good/bad) associations as well as their relative influences on explicit perceptions of police. Study 1 revealed that implicit threat evaluations (police-danger associations) more strongly predicted negative explicit views of the police compared to implicit valence evaluations (police-negative associations). Study 2 replicated these findings and suggests that individuals evaluate the police as more dangerous versus negative when each response is pitted against each other within single misattribution procedure trials. The possible implications for explicit attitudes toward police reform and behavior during police-civilian encounters are discussed.

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