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OBJECTIVE Event-related potentials (ERPs) were recorded to examine neural responses to face stimuli in a masking paradigm. METHODS Images of faces (neutral or fearful) and objects were presented in subthreshold, threshold, and suprathreshold conditions (exposure durations of approximately 20, 30 and 300 ms, respectively), followed by a 1000-ms pattern(More)
The aim of this study was to measure the impact of the distance between tactile stimuli marking brief time intervals on perceived duration and threshold estimates. Each interval to be categorized as short or long (midvalue=500 ms) was marked by two brief signals delivered on participants' left (L) or right (R) hand: L-L, R-R, L-R or R-L. The hands were(More)
The study investigated how the brain activity changed when participants were engaged in a temporal production task known as the "filled-duration illusion." Twelve right-handed participants were asked to memorize and reproduce the duration of time intervals (600 or 800 ms) bounded by two flashes. Random trials contained auditory stimuli in the form of three(More)
By constructing Gaussian Naïve Bayes Classifiers, we have re-analyzed data from an earlier event-related potential (ERP) study of an illusion in time perception known as auditory temporal assimilation. In auditory temporal assimilation, two neighboring physically unequal time intervals marked by three successive tone bursts are illusorily perceived as equal(More)
Brain activity related to time estimation processes in humans was analyzed using a perceptual phenomenon called auditory temporal assimilation. In a typical stimulus condition, two neighboring time intervals (T1 and T2 in this order) are perceived as equal even when the physical lengths of these time intervals are considerably different. Our previous(More)
It is generally accepted that the N170 component of an event-related potential (ERP) reflects the structural encoding of faces and is specialized for face processing. Recent neuroimaging and ERP studies have demonstrated that spatial frequency is a crucial factor for face recognition. To clarify which early ERP components reflect either coarse (low spatial(More)
Previous studies indicated that empty time intervals are better discriminated in the auditory than in the visual modality, and when delimited by signals delivered from the same (intramodal intervals) rather than from different sensory modalities (intermodal intervals). The present electrophysiological study was conducted to determine the mechanisms which(More)
Duration discrimination is severely impaired when the duration markers are delivered from different sensory modalities (intermodal) instead of from the same modality (intra-modal). The present study examined the brain activity related to this impairment using event-related potentials. Durations were marked either by two auditory signals (AA) or by an(More)
We used magnetoencephalogram (MEG) in two experiments to investigate spatio-temporal profiles of brain responses to gaps in tones. Stimuli consisted of leading and trailing markers with gaps between the two markers of 0, 30, or 80 ms. Leading and trailing markers were 300 ms pure tones at 800 or 3200 Hz.Two conditions were examined: the within-frequency(More)