University of Delaware (2006)
Associate Professor, Clinical
Office Hours: Flexible, by appointment
Phone Number: (631) 632-6272
Research Website: http://www.psychology.stonybrook.edu/ghajcak-/
Director, Anxiety Disorders Clinic: Anxiety Disorders Clinic
Areas of Interest:
Psychophysiological approaches to studying emotion and cognition; anxiety disorders and their treatment.
Dr. Hajcak's research utilizes event-related brain activity and other psychophysiological measures to study emotion and cognition. Dr. Hajcak is particularly interested in individual differences in affective information-processing that might place individuals at risk for developing psychopathology. One of Dr. Hajcak's main interests has been the relationship between anxiety and error-related brain activity. Dr. Hajcak has additional interests in using event-related brain activity to study more basic processes related to affective appraisal and emotion regulation. Finally, Dr. Hajcak has a long-standing clinical interest in anxiety disorders and their treatment. Please see Dr. Hajcak's Laboratory website for more information.
Hajcak, G., Moser, J.S., Holroyd, C.B., & Simons, R.F. (2006). The feedback-related negativity reflects the binary evaluation of good versus bad outcomes. Biological Psychology, 71, 148-154.
Moser, J.S., Hajcak, G., Bukay, E., & Simons, R.F. (2006). Intentional regulation of emotional responding to unpleasant pictures: An ERP study. Psychophysiology, 43, 292-296.
Hajcak, G., Moser, J.S., Yeung, N., & Simons, R.F. (2005). On the ERN and the significance of errors. Psychophysiology, 42, 151-160.
Moser, J.S., Hajcak, G., & Simons, R.F. (2005). The effects of fear on performance monitoring and attentional allocation. Psychophysiology, 42, 261-268.
Hajcak, G., Nieuwenhuis, S., Ridderinkhof, K.R., & Simons, R.F. (2005). Error-preceding brain activity: Robustness, temporal dynamics, and boundary conditions. Biological Psychology, 70, 67-78.
Hajcak, G., Holroyd, C.B., Moser, J.S., & Simons, R.F. (2005). Brain potentials associated with expected and unexpected good and bad outcomes. Psychophysiology, 42, 161-170.
Nieuwenhuis, S., Nielen, M., Mol, N., Hajcak, G., & Veltman, D. (2005). Performance monitoring in obsessive-compulsive disorder. Psychiatry Research, 134(2), 111-121.
Huppert, J.D., Moser, J.S., Gershuny, B., Riggs, D.S., Spokas, M., Filip, J., Hajcak, G., Parker, H., Baer, L., & Foa, E.B. (2005). The relationship between obsessive-compulsive and posttraumatic stress symptoms in clinical and non-clinical samples. Journal of Anxiety Disorders, 19, 127-136.
Hajcak, G., McDonald, N., & Simons, R.F. (2004). Error-related psychophysiology and negative affect. Brain and Cognition, 56, 189-197.
Hajcak, G., Huppert, J.D., Simons, R.F., & Foa, E.B. (2004). Psychometric properties of the OCI-R in a college sample. Behavior Research and Therapy, 42, 115-123.
Hajcak, G., Vidal, F. & Simons, R.F. (2004). Difficulties with easy tasks: ERN/Ne and stimulus component overlap. M. Ullsperger & M. Falkenstein (eds.) Errors, Conflicts, and the Brain: Current Opinions on Performance Monitoring. Leipzig: MPI of Cognitive Neuroscience, pp. 204-211.
Hajcak, G., McDonald, N., & Simons, R.F. (2003). To err is autonomic: error-related brain potentials, ANS activity, and post-error compensatory behavior. Psychophysiology, 40, 895-903.
Hajcak, G., McDonald, N., & Simons, R.F (2003). Anxiety and error-related brain activity. Biological Psychology, 64, 77-90.
Hajcak, G. & Simons, R.F. (2002). Error-related brain activity in obsessive-compulsive undergraduates. Psychiatry Research, 110, 63-72.
Foa, E.B., Huppert, J.D., Leiberg, S., Langner, R., Kichic, R, Hajcak, G., & Salkovskis, P. (2002) The Obsessive-Compulsive Inventory: Development and Validation of a Short Version. Psychological Assessment, 10, 206-214.
Current Research Support:
NIMH (F31- MH69047-02), “Error-related brain activity and pediatric anxiety.”
4/2003-7/2005. $75,000 (total costs).
Greg Hajcak (Principal Investigator)
NIMH (T32), "Child and adult trauma victims: A training progam."
7/2005 - 7/2006. $20,000 (total costs).
Dean G. Kilpatrick (Principal Investigator).