Psychophysiology
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The pupil as a measure of emotional arousal and autonomic activationAbstract Pupil diameter was monitored during picture viewing to assess effects of hedonic valence and emotional arousal on pupillary responses. Autonomic activity (heart rate and skin conductance) was concurrently measured to determine whether pupillary changes are mediated by parasympathetic or sympathetic activation. Following an initial light reflex, pupillary ch... ...
Psychophysiology - Tập 45 Số 4 - Trang 602-607 - 2008
Significance Testing of Difference PotentialsABSTRACT This note provides a statistical‐graphical method for the evaluation of the statistical significance of difference potentials from a group of subjects, and for the comparison of difference potentials between two groups. A table of the lengths of statistically significant intervals for various sampling interval lengths, numbers of subjects, and autocorrelati...
Psychophysiology - Tập 28 Số 2 - Trang 240-244 - 1991
The Continuing Problem of False Positives in Repeated Measures ANOVA in Psychophysiology: A Multivariate SolutionABSTRACT Violation of the validity assumptions of repeated measures analysis of variance continues to be a problem in psychophysiology. Such violation results in positive bias for those tests involving the repeated measures factor(s), Recently it has been shown that the tests of simple interactions and multiple comparisons are even more vulnerable to bias (Boik. 198... ...
Psychophysiology - Tập 24 Số 4 - Trang 479-486 - 1987
Aging and the Simon taskA visual Simon task was used to study the influence of aging on visuospatial attention and inhibitory control processes. Responses were much slower for elderly than for young participants. The delay in trials in which stimulus and response side did not correspond as compared to when they did correspond (the Simon effect) was larger for older people, even after correcting for general slowin... ...
Psychophysiology - Tập 39 Số 1 - Trang 100-110 - 2002
Influence of caffeine on selective attention in well‐rested and fatigued subjectsAbstract Effects of caffeine were studied in a visual focused selective search task in well‐rested and fatigued subjects. A dose of 200 + 50 mg caffeine or placebo, dissolved in decaffeinated coffee, was administered in a double‐blind and deceptive fashion. The task was to detect a target letter on one diagonal of a visual display designated as relevant and ignore s... ...
Psychophysiology - Tập 31 Số 6 - Trang 525-534 - 1994
A neurophysiological deficit in early visual processing in schizophrenia patients with auditory hallucinationsAbstract Existing 67‐channel event‐related potentials, obtained during recognition and working memory paradigms with words or faces, were used to examine early visual processing in schizophrenia patients prone to auditory hallucinations (AH , n...
Psychophysiology - Tập 49 Số 9 - Trang 1168-1178 - 2012
Slow Cortical Potentials in Subjects With High or Low Scores on a Questionnaire Measuring Physical Anhedonia and Body Image DistortionABSTRACT Slow cortical potentials, response speed, and peripheral physiological responses were investigated in two experiments with four groups of male subjects. Experiment 1 examined constant foreperiod reaction time in a sound‐light‐button press sequence with an interstimulus interval of 2 sec. Experiment 2 investigated constant foreperiod reaction time conditions... ...
Psychophysiology - Tập 18 Số 4 - Trang 371-380 - 1981
Slow Cortical Potentials Under Conditions of UncontrollabilityABSTRACT The present experiment investigates the influence of an unexpected change from an escape paradigm to uncontrollability on slow cortical potentials (SCPs) and autonomic responses (heart rate, skin conductance, and EMG). Two groups of 10 male students each participated in a reaction time experiment; subjects heard one of two warning stimuli (WS) of 6 sec dura... ...
Psychophysiology - Tập 16 Số 4 - Trang 374-380 - 1979
Assessment of the role of the cochlear latency effect in lateralization of click sounds in humansAbstract Interaural time and intensity disparities (ITD and IID) are the two cues to sound lateralization. “Time‐only” hypothesis claims that an IID is first converted to an interaural afferent delay (Δt ), and is then processed by the central ITD mechanism, rendering a separate IID processor unnecessary. We tested this hypothesis by assess... ...
Psychophysiology - Tập 46 Số 4 - Trang 797-806 - 2009
Comparison of electrodermal constant voltage and constant current recording techniques using the phase angle between alternating voltage and currentIf electrodermal activity is recorded with direct current, constant voltage and constant current measurements result in different dependencies of electrodermal reactions on the actual electrodermal level. The present study demonstrates empirically that such a problem does not exist when instead the phase angle changes between alternating current and voltage are obtained. Forty subjects wer... ...
Psychophysiology - Tập 37 Số 1 - Trang 85-91 - 2000
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