Greg Hajcak
Florida State University
Developmental psychologyPsychologyCognitive psychologyAnxietySocial psychology
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Publications 271
#1Elizabeth M. Mulligan (FSU: Florida State University)H-Index: 4
#2Greg Hajcak (FSU: Florida State University)H-Index: 71
Last. Alexandria Meyer (FSU: Florida State University)H-Index: 16
view all 4 authors...
Abstract The pubertal period is a time of rapid increase in the incidence of anxiety disorders, and thus, pubertal hormones may play a role in the precipitation of anxious psychopathology. DHEA, a steroid hormone that surges in adolescence, has been previously linked to anxiety, although the direction of this effect has been mixed. Using a cross-sectional design in a sample of 286 adolescent girls, the present study examined associations between salivary DHEA concentrations and self-report and i...
#1Rajapillai L. I. Pillai (SBU: Stony Brook University)H-Index: 3
#2Elizabeth BartlettH-Index: 3
Last. Christine DeLorenzo (SBU: Stony Brook University)H-Index: 16
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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]...
#1A. Hunter Threadgill (FSU: Florida State University)
#2Jonathan Ryan (FSU: Florida State University)
Last. Greg Hajcak (FSU: Florida State University)H-Index: 71
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Abstract Past work has demonstrated that the reward positivity (RewP) indexes a feedback-monitoring system sensitive to positive outcomes. Research on the RewP has frequently used simple guessing tasks. In the doors task, participants receive either feedback denoting monetary gain or loss on each trial after choosing one of two doors to “open.” Typically, these tasks present visual stimuli on a computer monitor. The current study developed and validate a version of the doors task utilizing audit...
#1Austin J. Gallyer (FSU: Florida State University)H-Index: 2
#2Kreshnik Burani (FSU: Florida State University)H-Index: 3
Last. Greg Hajcak (FSU: Florida State University)H-Index: 71
view all 9 authors...
A recent study by Tsypes, Owens, and Gibb (2019) found that children with recent suicidal ideation had blunted neural reward processing, as measured by the reward positivity (RewP), compared to matched controls, and that this difference was driven by reduced neural responses to monetary loss, rather than blunted neural response to monetary reward. Here, we aimed to conceptually replicate and extend these findings in two large samples of children and adolescents (n = 275 and n = 235). Results fro...
#1Brittany C. Speed (SBU: Stony Brook University)H-Index: 6
#2Greg Hajcak (FSU: Florida State University)H-Index: 71
1 CitationsSource
#1Dan Foti (Purdue University)H-Index: 28
#2Greg Perlman (SBU: Stony Brook University)H-Index: 14
Last. Roman Kotov (SBU: Stony Brook University)H-Index: 41
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BACKGROUND: Performance monitoring entails rapid error detection to maintain task performance. Impaired performance monitoring is a candidate pathophysiological process in psychotic disorders, which may explain the broader deficit in executive function and its known associations with negative symptoms and poor functioning. The current study models cross-sectional pathways bridging neurophysiological measures of performance monitoring with executive function, symptoms, and functioning. METHODS: D...
1 CitationsSource
#1Greg Hajcak (FSU: Florida State University)H-Index: 71
#2Dan Foti (Purdue University)H-Index: 28
Event-related potential studies of emotional processing have focused on the late positive potential (LPP), a sustained positive deflection in the ERP that is increased for emotionally arousing stimuli. A prominent theory suggests that modulation of the LPP is a response to stimulus significance, defined in terms of the activation of appetitive and aversive motivational systems. The current review incorporates experimental studies showing that manipulations that alter the significance of stimuli ...
5 CitationsSource
#1Alexandria Meyer (FSU: Florida State University)H-Index: 16
#2Brittany A. Gibby (FSU: Florida State University)H-Index: 5
Last. Norman B. Schmidt (FSU: Florida State University)H-Index: 66
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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”; ...
1 CitationsSource
#1Elizabeth M. Mulligan (FSU: Florida State University)H-Index: 4
#2Zachary P. Infantolino (SBU: Stony Brook University)H-Index: 10
Last. Greg Hajcak (FSU: Florida State University)H-Index: 71
view all 4 authors...
: The late positive potential (LPP) is characterized by temporal and spatial changes across development-though existing work has primarily relied on visual or statistical comparisons of relatively few electrodes and averaged activity over time. The current study used an empirically based approach to characterize temporal and spatial changes in ERPs over time. Data were utilized from a large longitudinal study (N = 380) in which the LPP was recorded to pleasant, neutral, and unpleasant pictures a...
#1Sucharit Katyal (UC Davis: University of California, Davis)
#1Sucharit Katyal (UC Davis: University of California, Davis)H-Index: 6
Last. Philippe R. Goldin (UC Davis: University of California, Davis)H-Index: 37
view all 5 authors...
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...