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Probing the Time-Course of the Auditory Oddball P3 With Secondary Reaction Time (1991)

Woodward, Steven H. ; Brown, Warren S. ; Marsh, James T. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Psychophysiology 28 (1991), S. 0

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ISSN: 1469-8986

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Medicine , Psychology

Notes: An elementary neural model of the P3 is proposed in which the P3 is held to manifest a brief, widely-distributed, inhibitory event. A preliminary and indirect test of the model is described using secondary-task methodology. Manual reaction times were measured to probe clicks delivered during the presumed time-course of an auditory oddball P3. We observed that reaction times to probes presented after oddball stimuli were significantly slowed as compared to reaction times to probes presented after standards. The latency of maximum reaction time slowing corresponded generally to the latency of the P3. The latency of maximum reaction time slowing did not respond to a manipulation varying the latency of the P3. Thus, some of the obtained results were consistent with the P3-inhibition hypothesis, whereas others were not. Secondary-task methodology may provide a valuable new approach to understanding the late event-related potentials.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1469-8986.1991.tb01003.x

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Subjective versus objective sleep in vietnam combat veterans hospitalized for PTSD (1996)

Woodward, Steven H. ; Bliwise, Donald L. ; Friedman, Matthew J. ; [et al.]

Springer

Journal of traumatic stress 9 (1996), S. 137-143

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ISSN: 1573-6598

Keywords: sleep ; PTSD ; subjective

Source: Springer Online Journal Archives 1860-2000

Topics: Psychology

Notes: Abstract Twenty-five Vietnam combat veterans with chronic severe posttraumatic stress disorder (PTSD) completed a sleep self-report questionnaire on admission to an inpatient treatment program. Between 1 and 2 months later each spent 3 or more nights in the sleep laboratory. When self-report and laboratory findings were compared, significant relationships were observed between sleep schedule items such as time-to-bed/time-out-of-bed and polysomnographic measures of sleep. In contrast, global ratings of sleep quality were generally unrelated to polysomnographic measures. These findings may have implications for survey research assessing sleep quality in traumatized populations.