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Greg Hajcak
Florida State University
Developmental psychologyPsychologyCognitive psychologyAnxietySocial psychology
259Publications
66H-index
16.6kCitations
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Publications 266
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#1Rajapillai L. I. Pillai (SBU: Stony Brook University)H-Index: 3
#2Elizabeth BartlettH-Index: 2
Last. Christine DeLorenzo (SBU: Stony Brook University)H-Index: 14
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Abstract Loudness dependence of auditory evoked potentials (LDAEP) has long been considered to reflect central basal serotonin transmission. However, the relationship between LDAEP and individual serotonin receptors and transporters has not been fully explored in humans and may involve other neurotransmitter systems. To examine LDAEP's relationship with the serotonin system, we performed PET using serotonin-1A (5-HT1A) imaging via [11C]CUMI-101 and serotonin transporter (5-HTT) imaging via [11C]...
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#1Alexandria Meyer (FSU: Florida State University)H-Index: 14
#2Brittany A. Gibby (FSU: Florida State University)H-Index: 5
Last. Norman B. Schmidt (FSU: Florida State University)H-Index: 65
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Research has identified the neural response to errors (the error-related negativity; ERN) as a marker of current anxiety, as well as risk for future anxiety. Previous work found that traditional cognitive behavioral therapy approaches do not impact the ERN. However, none of these approaches directly target the psychological constructs linked to an increased ERN (e.g., error sensitivity). In the current study, we examine the extent to which a brief, computerized intervention (“Treating the ERN”; ...
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#1Elizabeth M. Mulligan (FSU: Florida State University)H-Index: 3
#2Zachary P. Infantolino (SBU: Stony Brook University)H-Index: 9
Last. Greg Hajcak (FSU: Florida State University)H-Index: 66
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#1Sucharit Katyal (UC Davis: University of California, Davis)
#2Greg Hajcak (FSU: Florida State University)H-Index: 66
Last. Philippe R. Goldin (UC Davis: University of California, Davis)H-Index: 36
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Contemplative practices are thought to modify one’s experience of self and fundamentally change self-referential processing. However, few studies have examined the brain correlates of self-referential processing in long-term meditators. Here, we used the self-referential encoding task (SRET) to examine event-related potentials (ERP) during assessment of pleasant and unpleasant self-views in long-term meditators versus age-matched meditation-naive control participants. Compared with controls, med...
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#1Kreshnik Burani (FSU: Florida State University)
#2Austin J. Gallyer (FSU: Florida State University)H-Index: 1
Last. Greg Hajcak (FSU: Florida State University)H-Index: 66
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Stress and blunted reward processing are risk factors for mood disorders, including Major Depressive Disorder (MDD). The experience of acute stress reduces fMRI correlates of reward-related neural activity; however, few studies have examined how acute stress impacts measures of reward derived from event-related potentials (ERPs). The current study examined the impact of an acute stressor on the Reward Positivity (RewP), an ERP that indexes reward sensitivity, in twenty-seven college students. Pa...
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#1Julia Klawohn (FSU: Florida State University)H-Index: 8
#2Alexandria Meyer (FSU: Florida State University)H-Index: 14
Last. Greg Hajcak (FSU: Florida State University)H-Index: 66
view all 4 authors...
1 CitationsSource
#1Julia KlawohnH-Index: 8
Last. Greg HajcakH-Index: 66
view all 5 authors...
Source
#1Julia Klawohn (FSU: Florida State University)H-Index: 8
#2Nicholas J. Santopetro (FSU: Florida State University)
Last. Greg Hajcak (FSU: Florida State University)H-Index: 66
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Individuals with current depression show reduced amplitude of the P300 component of the stimulus-locked event-related potential (ERP)-an effect most often examined in oddball tasks. Although imperative stimuli in response-monitoring paradigms (e.g., the flanker task), also elicit a P300, it is unclear whether a blunted P300 can be observed in depression in these tasks. Moreover, the P300 overlaps with the correct-response negativity (CRN) and error-related negativity (ERN), and is similar to the...
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#1Diana J. Whalen (WashU: Washington University in St. Louis)H-Index: 15
#2Kirsten E. Gilbert (WashU: Washington University in St. Louis)H-Index: 8
Last. Deanna M (WashU: Washington University in St. Louis)H-Index: 77
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Reductions in positive affect are a salient feature of preschool-onset major depressive disorder. Yet, little is known about the psychophysiological correlates of this blunted positive affect and whether reduced physiological responding to pleasant stimuli may differentiate depressed and healthy young children. 120 four-to-seven year old children with current depression and 63 psychiatrically healthy 4-to-7 year old children completed a simple picture-viewing task of pleasant and neutral picture...
1 CitationsSource
#1Natalie Sachs-Ericsson (FSU: Florida State University)H-Index: 33
#2Dawn C. Carr (FSU: Florida State University)H-Index: 11
Last. Greg Hajcak (FSU: Florida State University)H-Index: 66
view all 6 authors...
AbstractObjectives: There is an association between depression and diminished social support; indeed, interpersonal dysfunction is often a central feature of depression. The purpose of this study i...
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