Multisensory temporal numerosity judgment

Philippi, Tom G.; Erp, J.B.F. van; Werkhoven, Peter

doi:10.1016/j.brainres.2008.05.056

Cited by 52 publications

(54 citation statements)

References 53 publications

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“…With respect to systematic errors, therefore, counting taps is more accurate than counting flashes. This is in agreement with the findings that were reported by Philippi, van Erp, and Werkhoven (2008).…”

Section: Main Experimentssupporting

confidence: 94%

“…This is consistent with data from most previous studies, all of which reported insignificant differences (Andersen et al, 2004;Violentyev et al, 2005;Wozny et al, 2008). It should be noted that Philippi et al (2008)-who studied uni-, bi-, and trimodal temporal-numerosity judgments for a wide range of ISIs (20-320 msec) and number of events ( 2-10)-did find significant differences in bias for uniand multimodal conditions; however, they did not report significant differences for the vision and touch combination at the ISIs that were tested here.…”

Section: Main Experimentssupporting

confidence: 93%

“…In fact, multimodal presentation slightly increased the SD of responses (4% for taps, 0% for flashes). This is consistent with Philippi et al (2008), who found that the variance of congruent stimuli decreased relative to unisensory stimuli for interstimulus intervals (ISIs) of 160 msec and larger, but that it increased for shorter ISIs.…”

Section: Main Experimentssupporting

confidence: 79%

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Counting visual and tactile events: The effect of attention on multisensory integration

Werkhoven

Erp²,

Philippi

2009

Attention, Perception, & Psychophysics

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Irrelevant events in one sensory modality can influence the number of events that are perceived in another modality. Previously, the underlying process of sensory integration was studied in conditions in which participants knew a priori which sensory modality was relevant and which was not. Consequently, (bottom-up) sensory interference and (top-down) selective attention were confounded. We disentangled these effects by measuring the influence of visual flashes on the number of tactile taps that were perceived, and vice versa, in two conditions. In the cue condition, participants were instructed on which modality to report before the bimodal stimulus was presented. In the no-cue condition, they were instructed after stimulus presentation. Participants reported the number of events that they perceived for bimodal combinations of one, two, or three flashes and one, two, or three taps. Our main findings were that (1) in no-cue conditions, the influence of vision on touch was stronger than was the influence of touch on vision; (2) in cue conditions, the integration effects were smaller than those in no-cue conditions; and (3) irrelevant taps were less easily ignored than were irrelevant flashes. This study disentangled previously confounded bottom-up and top-down effects: The bottom-up influence of vision on touch was stronger, but vision was also more easily suppressed by top-down selective attention. We have compared our results qualitatively and quantitatively with recently proposed sensory-integration models.

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Section: Main Experimentssupporting

confidence: 94%

Section: Main Experimentssupporting

confidence: 93%

Section: Main Experimentssupporting

confidence: 79%

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Counting visual and tactile events: The effect of attention on multisensory integration

Werkhoven

Erp²,

Philippi

2009

Attention, Perception, & Psychophysics

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“…Research on perceptual integration indicates that multisensory stimuli are generally beneficial for perceptual task performance [25,26]. More specifically, multisensory perception can improve reaction time [27,28,29,30], improve stimulus detection [31], and reduce signal variability [32,26,33,34,35].…”

Section: Multisensory Perception Of Landmarksmentioning

confidence: 99%

Navigating virtual mazes: The benefits of audiovisual landmarks

Werkhoven

Erp²,

Philippi

2014

Displays

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It has been shown that multisensory presentation can improve perception, attention, and object memory compared with unisensory presentation. Consequently, we expect that multisensory presentation of landmarks can improve spatial memory and navigation. In this study we tested the effect of visual, auditory and combined landmark presentations in virtual mazes on spatial memory and spatial navigation. Nineteen participants explored four different virtual mazes consisting of nodes with landmarks and corridors connecting them. Each maze was explored for 90 seconds. After each exploration, participants performed the following tasks in fixed order: 1) draw a map of the maze, 2) recall adjacent landmarks for three given landmarks, 3) place all landmarks on the map of the maze, and 4) find their way through the maze to locate five given landmarks in fixed order. Our study shows significant effects of multisensory versus unisensory landmarks for the maze drawing task, the adjacency task, and the wayfinding task. Our results suggest that audiovisual landmark presentations improve spatial memory and spatial navigation performance in virtual environments.

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“…Talsma et al [43] found that only when participants attended to both a stimulus' audio and visual modalities, a superadditive effect on the P50 occurred. It is generally assumed that for multisensory integration to occur, stimuli should coincided in time as well as in space ( [29], although see [46] for an example of multisensory integration for stimuli that are not colocated). The "bimodal" stimuli used in the present study are cooccurring in time and are representing the same symbolic direction, but they are spatially disparate (i.e., on the waist and on the computer screen), possibly preventing a rapid and early integration.…”

Section: Discussionmentioning

confidence: 99%

Tactile, Visual, and Bimodal P300s: Could Bimodal P300s Boost BCI Performance?

Brouwer¹,

Erp²,

Aloise

et al. 2010

SRX Neuroscience

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The P300 is a positive peak in EEG occurring after presentation of a target stimulus. For brain-computer interfaces (BCIs), eliciting P300s by tactile stimuli would have specific advantages; the display can be hidden under clothes and keeps the user's gaze free. In addition, robust classification is especially important for BCIs. This motivated us to investigate P300s in response to tactile and visual stimuli unimodally and bimodally. Tactile stimuli were delivered by tactors around the participant's waist. Visual stimuli were flashed circles on a monitor, schematically representing the tactors. Participants attended to the vibrations and/or flashes of a "target" presented in a stream of standards. The P300 amplitude for the different modalities was comparable in size and depended on electrode location. Classification accuracy was highest in the bimodal condition. We conclude that bimodal stimuli could enhance classification results within a BCI context compared to unimodal presentations.

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Multisensory temporal numerosity judgment

Cited by 52 publications

References 53 publications

Counting visual and tactile events: The effect of attention on multisensory integration

Counting visual and tactile events: The effect of attention on multisensory integration

Navigating virtual mazes: The benefits of audiovisual landmarks

Tactile, Visual, and Bimodal P300s: Could Bimodal P300s Boost BCI Performance?

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