Akina Umemoto

Akina Umemoto
Columbia University | CU · Department of Psychiatry

PhD

About

19
Publications
1,262
Reads
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383
Citations
Additional affiliations
September 2010 - March 2016
University of Victoria
Position
  • PhD Student
September 2010 - March 2016
University of Victoria
Position
  • PhD Student
September 2008 - June 2010
University of Oregon
Position
  • Master's Student

Publications

Publications (19)
Article
Social anxiety disorder (SAD) is associated with fear of negative evaluation and heightened performance monitoring. The best-established treatments help only a subset of patients, and there are no well-established predictors of treatment response. The current study investigated whether individual differences in processing errors might predict respo...
Article
For several decades, resting electroencephalogram (EEG) alpha oscillations have been used to characterize neurophysiological alterations related to major depressive disorder. Prior research has generally focused on frontal alpha power and asymmetry despite resting alpha being maximal over posterior electrode sites. Research in depressed adults has...
Preprint
Navigating through everyday life requires us to make series of choices involving effort: Isit worth the effort for what I want to accomplish? Effort-based decision making depends on evaluating the value of effort-related costs against potential rewards, and only when the rewards outweigh their effort costs do effortful behaviors tend to get carried...
Article
Successful execution of goal-directed behaviors often requires the deployment of cognitive control, which is thought to require cognitive effort. Recent theories have proposed that anterior cingulate cortex (ACC) regulates control levels by weighing the reward-related benefits of control against its effort-related costs. However, given that the sen...
Preprint
Full-text available
Successful execution of goal-directed behaviors often requires the deployment of cognitive control, which is thought to require cognitive effort. Recent theories have proposed that anterior cingulate cortex (ACC) regulates control levels by weighing the reward-related benefits of control against its effort-related costs. However, given that the sen...
Article
Objective: Although impaired reward processing in depression has been well-documented, the exact nature of that deficit remains poorly understood. To investigate the link between depression and the neural mechanisms of reward processing, we examined individual differences in personality. Methods: We recorded the electroencephalogram from healthy...
Article
The anterior cingulate cortex (ACC) is commonly associated with cognitive control and decision making, but its specific function is highly debated. To explore a recent theory that the ACC learns the reward values of task contexts (Holroyd & McClure in Psychological Review, 122, 54–83, 2015; Holroyd & Yeung in Trends in Cognitive Sciences, 16, 122–1...
Article
The United States National Institute of Mental Health has recently promoted the Research Domain Criteria framework, which emphasizes the study of neurocognitive constructs that cut across different disorders. These constructs are said to express dimensionally across the population, giving rise to psychopathologies only in the extreme cases where th...
Chapter
Anterior cingulate cortex (ACC) is involved in cognitive control and decision-making but its precise function is still highly debated. Based on evidence from lesion, neurophysiological, and neuroimaging studies, we have recently proposed a critical role for ACC in motivating extended behaviors according to learned task values (Holroyd and Yeung, 20...
Article
Full-text available
Phase reset of parahippocampal electrophysiological oscillations in the theta frequency range is said to contribute to item encoding and retrieval during spatial navigation. Although well-studied in non-human animals, this mechanism is poorly understood in humans. Previously we found that feedback stimuli presented in a virtual maze environment eli...
Article
Although cognitive control and reinforcement learning have been researched extensively over the last few decades, only recently have studies investigated their interrelationship. An important unanswered question concerns how the control system decides what task to execute and how vigorously to carry out the task once selected. Based on a recent the...
Article
Decades of research have examined the neurocognitive mechanisms of cognitive control, but the motivational factors underlying task selection and performance remain to be elucidated. We recently proposed that anterior cingulate cortex (ACC) utilizes reward prediction error signals carried by the midbrain dopamine system to learn the value of tasks a...
Article
Observers can voluntarily select which items are encoded into working memory, and the efficiency of this process strongly predicts memory capacity. Nevertheless, the present work suggests that voluntary intentions do not exclusively determine what is encoded into this online workspace. Observers indicated whether any items from a briefly stored sam...
Article
The bilateral advantage refers to a phenomenon in which performance is enhanced for visual information that is processed from both visual hemifields rather than a single hemifield. Alvarez and Cavanagh (2005) provided a compelling demonstration of the bilateral advantage in a multiple object tracking task in which there was an apparent doubling of...
Article
Various studies have demonstrated enhanced performance when visual information is presented across both visual hemifields rather than in a single hemifield (the bilateral advantage). For example, Alvarez and Cavanagh (2005) reported that observers were able to track twice as many moving visual stimuli when the tracked items were presented bilateral...
Article
It is known that subjects can exert voluntary control over what is encoded into working memory. Does implicit knowledge also influence what is encoded into this online workspace? To examine this question, we measured subjects' ability to detect changes in an array of colored squares, following a brief delay period that required the items to be main...

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Projects

Projects (2)
Project
I utilize ERPs (eg, reward positivity) and oscillations (frontal midline theta) to examine reward and motivation deficits associated with depression. My work has been centering around understanding anterior cingulate cortex (ACC) function.
Project
I utilize ERPs (eg, reward positivity) and oscillations (eg, frontal midline theta) to understand reward and motivation deficits associated with depression. My work has been centered around understanding anterior cingulate cortex (ACC) function.