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Volume 8 (1990)
- Issue 2 Pages 61-
- Issue 1 Pages 1-
Volume 8, Issue 2
Displaying 1-5 of 5 articles from this issue
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Takehiko YAMAMURA, Norihiko SASAKI1990 Volume 8 Issue 2 Pages 61-69
Published: 1990
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSHeart rate (HR) responses were analyzed in twenty field polygraph records for the guilty person paradigm using the paired control question technique (CQT) to detect deception, including 60 relevant and control questions. All outcomes as to whether the subjects were deceptive or truthful were verified since the 10 deceptive subjects were convicted of their charge (D-context) and the remaining 10 truthful subjects were acquitted of their charge (T-context). The ratio of HR during the question period (Q-p) and during the answer period (A-p) to the prestimulus HR (the five beats before question onset) cinstituted the index of HR change to each question.
Tonic HR increased in D-context as compared to T-context. The phasic HR accelerated significantly during Q-p to the relevant and control questions in D-context and during Q-p to the relevant question in T-context, while no significant change of HR was demonstrated during A-p to the relevant and control questions in both contexts. These results indicate that tonic HR responses can have an important role in discriminaing deception and truthfulness in a field situation. However, phasic HR change has no apparent relation to the relevant question in field CQT. These findings suggest that HR change derived from attentive processes of subject's set may be important in the detection of deception for a field population.View full abstractDownload PDF (1261K) -
Shigeru YOSHIDA1990 Volume 8 Issue 2 Pages 71-80
Published: 1990
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSThe dual process model (Yoshida, 1990) was applied to visual evoked potentials to photic stimulus trains (train-VEPs). A small light disk subtending 2 or 5 degrees in visual angle was presented at different contrast levels of 1.0, 2.2, and 3.4. A pulse-light with a duration of 10ms was repeated, as a stimulus train, at the intervals of 50,100, and 200ms for the period of 1 s. Typical train-VEPs from the midline occiput (Oz) were analyzed. The model hypothesized that the train-VEPs were composed of the on and off basic dual (excitatory and inhibitory) processes and the small after rhythmic waves whose latencies were shorten by light adaptation. Thirteen parameters of the model were determined by the Fletcher-Powell method and the multiple regression method. The synthesized model waves fitted the raw train-VEPs well, and were able to express their early suppression and later enhancement of amplitudes. Contrast potentials of train-VEPs had close relationships with the steady-state VEPs and psychological correlates.View full abstractDownload PDF (1153K) -
Tsunetaka OKITA, Kenzo KONISHI, Takashi MOROTOMI, Harumi TANAKA1990 Volume 8 Issue 2 Pages 81-93
Published: 1990
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSEvent-related potentials (ERPs) were recorded while subjects received patterned stimuli that were presented briefly in random order to upper and lower visual fields at intervals of 430-540ms. In attention conditions, subjects were instructed to maintain eye fixation to a central point, and attend to one visual field in order to detect occasional targets, stimuli with slightly different pattern. Passive control, no task conditions were also administered to check the influence of fixation shifts on ERPs. In consistent with the previous studies of pattern visual-evoked potentials (VEPs), the early ERP deflections over parietal and occipital areas revealed a striking reversal of polarity between upper and lower field stimulation : P120-180 to upper stimuli and N140-190 to lower stimuli. Selective spatial attention was manifested in the P120-180 and N140-180 waves as an amplitude enhancement. The fixation shifts in the control conditions produced a different pattern of ERP changes. These findings suggest attention effects on the pattern-specific VEP component, C2.View full abstractDownload PDF (1641K) -
Noriyoshi TAKASAWA, Ryosuke TAKINO, Katuo YAMAZAKI1990 Volume 8 Issue 2 Pages 95-101
Published: December 31, 1990
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSEvent-related potentials were recorded from 12 adult subjects who listened to feedback tones during motor learning which required to control the force level of trigger pulling movement under the design of manipulating task difficulty and motivational state. Subjects were asked to pull a lever with the right index finger at his own pace and at a required force level. Feedback signals were three kinds of pip tones which indicated the force level to be correct (adequate ; 2000 Hz) or incorrect (below ; 500 Hz, over ; 4000 Hz) for the required level. Subjects heard one of these three tones immediately after each motor performance.
In every task condition, feedback tones elicited P3 component. And, irrespective of correct or incorrect feedback tones, the P3 amplitude and latency were almost equal. Negative ERPs having a peak latency of about 210ms (Nd wave) were observed only with incorrect feedback, and amplitude of Nd became larger with the progress of training. These results were discussed in relation to the between-channel selection and the within-channel selection in selective attention.View full abstractDownload PDF (939K) -
1990 Volume 8 Issue 2 Pages 102-129
Published: December 31, 1990
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSDownload PDF (4062K)
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