# overview
My work aims to understand how internal goals and external environments influence voluntary task selection. The primary goal of my research is to understand the mechanisms underlying cognitive flexibility, the ability to switch between tasks or behaviors quickly and efficiently. Cognitive flexibility is disrupted in several mental health disorders such as psychosis, addiction, and autism. Most studies of cognitive flexibility rely on external cues to determine when and which task to perform, but in the real world this choice is under our voluntary control. While external influences may make these decisions difficult, e.g., seeing ads for junk food when we are trying to make healthy choices, they are nevertheless under a degree of internal control. My work takes the unique perspective of focusing on voluntary control in cognitive flexibility. I take a multimodal approach, using brain imaging (fMRI) and measures of electrical brain activity (EEG) to examine the dynamics of the underlying neural mechanisms, and electrical brain stimulation to better understand brain-behavior causal links. More recently, I've been applying computational modeling to determine the exact components underlying task selection. The long-term objective of my research is to understand the factors that limit flexibility to better inform treatments for psychopathology and to maximize flexibility in healthy individuals.

# keywords[]
5204 Cognitive And Computational Psychology

# keywords[]
2.3 Psychological, Social And Economic Factors

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1.2 Psychological And Socioeconomic Processes

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5204 Cognitive And Computational Psychology

# keywords[]
Clinical Trials And Supportive Activities

# keywords[]
5204 Cognitive And Computational Psychology

# keywords[]
1.2 Psychological And Socioeconomic Processes

# keywords[]
5201 Applied And Developmental Psychology

# keywords[]
5204 Cognitive And Computational Psychology

# keywords[]
Networking And Information Technology R&d (nitrd)

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1.1 Normal Biological Development And Functioning

# keywords[]
5201 Applied And Developmental Psychology

# keywords[]
1.2 Psychological And Socioeconomic Processes

# keywords[]
5204 Cognitive And Computational Psychology

# keywords[]
2.3 Psychological, Social And Economic Factors

# keywords[]
1.2 Psychological And Socioeconomic Processes

# keywords[]
5204 Cognitive And Computational Psychology

# keywords[]
1.2 Psychological And Socioeconomic Processes

# keywords[]
5201 Applied And Developmental Psychology

# keywords[]
Clinical Trials And Supportive Activities

# keywords[]
1.1 Normal Biological Development And Functioning

# keywords[]
1.2 Psychological And Socioeconomic Processes

# keywords[]
5204 Cognitive And Computational Psychology

# keywords[]
Networking And Information Technology R&d (nitrd)

# keywords[]
1.1 Normal Biological Development And Functioning

# educationAndTraining[].organization.label
University of Michigan-Ann Arbor - (Ann Arbor, Michigan, United States)

# educationAndTraining[].organization.label
University of Pittsburgh - (Pittsburgh, Pennsylvania, United States)

# educationAndTraining[].organization.label
University of Michigan-Ann Arbor - (Ann Arbor, Michigan, United States)

# educationAndTraining[].organization.label
University of Colorado Boulder - (Boulder, Colorado, United States)

# publications[].label
Adolescents at clinical high risk for psychosis show qualitatively altered patterns of activation during rule learning.

# publications[].label
A Pilot Study Using Two Novel fMRI Tasks: Understanding Theory of Mind and Emotion Recognition Among Children With ASD

# publications[].label
The Role of Uncertain Reward in Voluntary Task-switching as Revealed by Pupillometry and Gaze

# publications[].label
The neural mechanisms underlying internally and externally guided task selection.

# publications[].label
Striatal abnormalities and spontaneous dyskinesias in non-clinical psychosis.

# publications[].label
Effects of prefrontal tDCS on executive function: Methodological considerations revealed by meta-analysis.

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Widespread brain dysconnectivity associated with psychotic-like experiences in the general population.

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Toward a more sophisticated response representation in theories of medial frontal performance monitoring: The effects of motor similarity and motor asymmetries.

# publications[].label
Reward uncertainty shapes cognitive flexibility

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Orbitofrontal cortex volume and brain reward response in obesity.

# publications[].label
Real-World Media Multitasking Shows Few Effects on Lab-Based Volitional Multitasking Performance

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Effects of media multitasking frequency on a novel volitional multitasking paradigm.

# publications[].label
Dissociable Cerebellar-Prefrontal Networks Underlying Executive Function: Evidence from the Human Connectome Project

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Abnormal hippocampal-thalamic white matter tract development and positive symptom course in individuals at ultra-high risk for psychosis.

# publications[].label
Neurological soft signs predict abnormal cerebellar-thalamic tract development and negative symptoms in adolescents at high risk for psychosis: a longitudinal perspective.

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Cerebellar and prefrontal-cortical engagement during higher-order rule learning in older adulthood.

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Striatal-frontal network activation during voluntary task selection under conditions of monetary reward.

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Organization of the Human Frontal Pole Revealed by Large-Scale DTI-Based Connectivity: Implications for Control of Behavior.

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Motor behavior reflects reduced hemispheric asymmetry in the psychosis risk period.

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Anterior cingulate cortex makes 2 contributions to minimizing distraction.

# publications[].label
Cerebello-thalamo-cortical networks predict positive symptom progression in individuals at ultra-high risk for psychosis.

# publications[].label
The role of the error positivity in the conscious perception of errors.

# publications[].label
Succumbing to bottom-up biases on task choice predicts increased switch costs in the voluntary task switching paradigm.

# publications[].label
Brain volume in chronic schizophrenia and first episode psychoses: Automated ROI based approach in a sample of 112 subjects

# publications[].label
Implementation of High-Performance Correlation and Mapping Engine for Rapid Generation of Brain Connectivity Networks from Big fMRI Data.

# publications[].publisher
Institute of Electrical and Electronics Engineers (IEEE)

# publications[].label
OpenSync: An opensource platform for synchronizing multiple measures in neuroscience experiments

# publications[].label
Cerebellar and Prefrontal-Cortical Engagement During Higher-Order Rule Learning in Older Adulthood

# publications[].label
Sleep dysfunction and thalamic abnormalities in adolescents at ultra high-risk for psychosis.

# publications[].label
Component processes underlying voluntary task selection

# publications[].label
Age Differences in the Subcomponents of Executive Functioning.

# publications[].label
The cerebellum and learning of non-motor associations in individuals at clinical-high risk for psychosis.

# publications[].label
Cerebellar networks in individuals at ultra high-risk of psychosis: impact on postural sway and symptom severity.

# publications[].label
A Pilot Study Using Two Novel fMRI Tasks: Understanding Theory of Mind and Emotion Recognition Among Children With ASD

# publications[].label
Cerebellar Morphology and Procedural Learning Impairment in Neuroleptic-Naive Youth at Ultrahigh Risk of Psychosis.

# publications[].label
OpenSync: An open-source platform for synchronizing multiple measures in neuroscience experiments.

# publications[].label
Physical activity level and medial temporal health in youth at ultra high-risk for psychosis.

# publications[].label
Individual differences in regional prefrontal gray matter morphometry and fractional anisotropy are associated with different constructs of executive function.

# publications[].label
Effects of prefrontal tDCS on dopamine-mediated behavior and psychophysiology

# publications[].label
High-Performance Correlation and Mapping Engine for rapid generating brain connectivity networks from big fMRI data

# publications[].label
Reward uncertainty shapes cognitive flexibility

# publications[].label
Orbitofrontal cortex volume and intrinsic religiosity in non-clinical psychosis.

# publications[].label
Preliminary effects of prefrontal tDCS on dopamine-mediated behavior and psychophysiology.

# publications[].label
The role of uncertain reward in voluntary task-switching as revealed by pupillometry and gaze.

# publications[].label
Social reward processing: A biomarker for predicting psychosis risk?

# publications[].label
Striatal-frontal network activation during voluntary task selection under conditions of monetary reward

# publications[].label
Component processes underlying voluntary task selection: Separable contributions of task-set inertia and reconfiguration.

# publications[].label
Cortical Morphometry in the Psychosis Risk Period: A Comprehensive Perspective of Surface Features.

# publications[].label
Increased postural sway predicts negative symptom progression in youth at ultrahigh risk for psychosis.

# publications[].label
Differential motor and prefrontal cerebello-cortical network development: Evidence from multimodal neuroimaging.

# publications[].label
Longitudinal Assessment and Functional Neuroimaging of Movement Variability Reveal Novel Insights Into Motor Dysfunction in Clinical High Risk for Psychosis.

# publications[].label
Distinct and opposite profiles of connectivity during self-reference task and rest in youth at clinical high risk for psychosis.

# publications[].label
Hippocampal Shape Abnormalities Predict Symptom Progression in Neuroleptic-Free Youth at Ultrahigh Risk for Psychosis.

# publications[].label
The Organization of Right Prefrontal Networks Reveals Common Mechanisms of Inhibitory Regulation Across Cognitive, Emotional, and Motor Processes.

# publications[].label
Recreational marijuana use impacts white matter integrity and subcortical (but not cortical) morphometry.

# publications[].label
Generalized signaling for control: evidence from postconflict and posterror performance adjustments.

# publications[].label
The influence of response conflict on voluntary task switching: a novel test of the conflict monitoring model.

# publications[].label
Emotion recognition and social/role dysfunction in non-clinical psychosis.

# publications[].label
ABNORMAL HIPPOCAMPAL-THALAMIC WHITE MATTER TRACT DEVELOPMENT AND DISEASE COURSE IN ADOLESCENTS AT ULTRA HIGH-RISK FOR PSYCHOSIS

# publications[].label
Component processes underlying voluntary task selection

# publications[].label
Media Multitasking Negatively Impacts Cognitive Flexibility

# publications[].label
Creativity on demand - Hacking into creative problem solving.

# publications[].label
Reward and feedback processing in voluntary task-switching: joint evidence from pupillometry and EEG

# publications[].label
Correction to: Striatal-frontal network activation during voluntary task selection under conditions of monetary reward.

# publications[].label
Opensync: An Opensource Platform for Synchronizing Multiple Measures in Neuroscience Experiments

# publications[].label
Early signs of disrupted rule learning in adolescents at clinical high risk for psychosis

# publications[].label
Age Differences in the Subcomponents of Executive Functioning

# researcherOn[].label
FW-HTF-RM: Augmenting Spatial Cognition Capabilities of Future Workforce to Enhance Work Performance in Altered Environments Using Virtual Reality

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# researcherOn[].label
Augmenting Spatial Cognition Capabilities of Future Workforce for Enhanced Human Performance in Altered Gravitational Environments Using Virtual Reality Technologies.

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# streetAddress
515 Coke Street; Psychological and Brain Sciences; 4235 TAMU