RAY JOHNSON, Jr.
||University of Illinois
||A-316 Science Building
||E-343 Science Building
Dr. Johnson's research is concerned with using event-related brain potentials (ERPs) to characterize and quantify the nature of the processes and neural systems underlying such cognitive processes as deception, executive functions, long-term memory and, more recently, those in the realm of social cognitive neuroscience. Current scientific collaborations are aimed at investigating the cognitive and neural basis of the changes in memory and executive functions with aging, the mechanism of action of sedative drugs on memory and stuttering.
Johnson, R., Jr., Nessler, D. and Friedman, D. Temporally-specific divided attention tasks in young adults reveal the temporal dynamics of episodic encoding failures in elderly adults. Psychology and Aging, in press.
Nessler, D., Friedman, D. and Johnson, R., Jr. A new account of the effect of probability on task switching: ERP evidence following the manipulation of switch probability, cue informativeness and predictability. Biological Psychology, 91: 245-262, 2012.
Johnson, R., Jr., Simon, E.J., Henkell, H. and Zhu, J. The role of episodic memory in controlled evaluative judgments about attitudes: An event-related potential study. Neuropsychologia, 49: 945-960, 2011.
Veselis, R.A., Pryor, K., Reinsel, R.A., Li, Y., Mehta, M. and Johnson, R., Jr. Propofol and midazolam inhibit conscious memory processes very soon after encoding: An event-related potential study of familiarity and recollection in volunteers. Anesthesiology, 110: 295–312, 2009.
Johnson, R., Jr., Barnhardt, J. and Zhu, J. The deceptive response: Effects of response conflict and strategic monitoring on the late positive component and episodic memory-related brain activity. Biological Psychology, 64: 217-253, 2003.
Johnson, R., Jr., Barnhardt, J. and Zhu, J. The contribution of executive processes to deceptive
responding. Neuropsychologia, 42: 878-901, 2004.
Johnson, R., Jr., Barnhardt, J. and Zhu, J. Differential effects of practice on the executive
processes used for truthful and deceptive responses: An event-related brain potential study. Cognitive Brain Research, 25: 386-404, 2005.
Nessler, D., Johnson, R., Jr., Bersick, M. and Friedman, D. On why the elderly have normal
semantic retrieval but deficient episodic encoding: An ERP study of left inferior frontal ERP activity. NeuroImage, 30: 299-312, 2006.
Nessler, D., Friedman, D., Johnson, R., Jr. and Bersick, M. Does repetition engender the same
retrieval processes in young and older adults? Neuroreport, 18: 1837-1840, 2007.
Johnson, R., Jr., Henkell, H., Simon, E.J. and Zhu, J. The self in conflict: The role of executive
processes during truthful and deceptive responses about attitudes. NeuroImage, 39: 469-482, 2008.
Nessler, D., Johnson, R., Jr., Bersick, M. and Friedman, D. Age-related ERP differences at
retrieval persist despite age-invariant performance and left-frontal negativity during encoding. Neuroscience Letters, 432: 151–156, 2008.
Veselis, R.A., Pryor, K., Reinsel, R.A., Mehta, M., Pan, H. and Johnson, R., Jr. Amnesic doses
of propofol do not affect the left inferior pre-frontal cortex during encoding of long term verbal memory. Anesthesiology, 109: 213–224, 2008.