Topographic ERP Analyses: A Step-by-Step Tutorial Review

Murray, Micah M.; Brunet, Denis; Michel, Christoph M.

doi:10.1007/s10548-008-0054-5

Cited by 1,008 publications

(1,356 citation statements)

References 67 publications

Supporting

Mentioning

1,330

Contrasting

Unclassified

Order By: Relevance

“…Table 3 and Supplemental Material 2). Further investigations and experiments are required to disentangle effects of low-level features of the presented sounds and possible priming effects in relation to their impact on subjects' behavior (see Murray et al, 2008;De Lucia et al, 2010c for priming effects induced by environmental sounds repetition).…”

Section: Discussionmentioning

confidence: 99%

Auditory perceptual decision-making based on semantic categorization of environmental sounds

et al. 2012

Self Cite

View full text Add to dashboard Cite

Discriminating complex sounds relies on multiple stages of differential brain activity. The specific roles of these stages and their links to perception were the focus of the present study. We presented 250 ms duration sounds of living and man-made objects while recording 160-channel electroencephalography (EEG). Subjects categorized each sound as that of a living, man-made or unknown item. We tested whether/when the brain discriminates between sound categories even when not transpiring behaviorally. We applied a single-trial classifier that identified voltage topographies and latencies at which brain responses are most discriminative. For sounds that the subjects could not categorize, we could successfully decode the semantic category based on differences in voltage topographies during the 116-174 ms post-stimulus period. Sounds that were correctly categorized as that of a living or man-made item by the same subjects exhibited two periods of differences in voltage topographies at the single-trial level. Subjects exhibited differential activity before the sound ended (starting at 112 ms) and on a separate period at~270 ms post-stimulus onset. Because each of these periods could be used to reliably decode semantic categories, we interpreted the first as being related to an implicit tuning for sound representations and the second as being linked to perceptual decision-making processes. Collectively, our results show that the brain discriminates environmental sounds during early stages and independently of behavioral proficiency and that explicit sound categorization requires a subsequent processing stage.

show abstract

Section: Discussionmentioning

confidence: 99%

Auditory perceptual decision-making based on semantic categorization of environmental sounds

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…This method is independent of the reference electrode (Michel et al, 2001(Michel et al, , 2004) and insensitive to pure amplitude modulations across conditions (topographies of normalized maps are compared). A modified hierarchical clustering analysis (Michel et al, 2001;Pascual-Marqui, Michel, & Lehmann, 1995), the agglomerative hierarchical clustering (Murray, Brunet, & Michel, 2008) was used to determine the most dominant configurations of the electric field at the scalp (topographic maps). A modified cross-validation criterion was used to determine the optimal number of maps that explained the best the group-averaged data sets across conditions.…”

Section: Topographic Pattern Analysismentioning

confidence: 99%

Comparing Electrophysiological Correlates of Word Production in Immediate and Delayed Naming Through the Analysis of Word Age of Acquisition Effects

Laganaro

Perret

2010

Brain Topogr

View full text Add to dashboard Cite

Most EEG studies analysing speech production with event related brain potential (ERP) have adopted silent metalinguistic tasks or delayed or tacit picture naming in order to avoid possible artefacts during motor preparation. A central issue in the interpretation of these results is whether the processes involved in those tasks are comparable to those involved in overt speech production. In the present study we addressed a methodological issue about the integration of stimulus-aligned and response-aligned ERPs in immediate overt picture naming in comparison to delayed production, coupled with a theoretical point on the effect of word Age of Acquisition (AoA). High density EEG recordings were used and waveform analyses and spatio-temporal segmentation were combined on stimulus-aligned and response-aligned ERPs. The same sequence and duration of topographic maps appeared in the immediate and delayed production until around 350 ms after picture onset, revealing similar encoding processes until the beginning of phonological encoding, but modulations linked to word AoA were only observed in the immediate production. Considering stimulus-aligned and responsealigned ERPs together allowed to identify that a stable topography starting around 350 ms lasts 30 ms longer for late-acquired than for early-acquired words. This difference falls within the time-window of phonological encoding and its modulation can be linked to the longer production latencies for late-acquired words.3

show abstract

“…In addition, the use of stimuli of different duration may explain some of their findings [6]. Finally and independent of the stimuli used, the ERP analyses performed by both Thierry and Roberts [12] and Czigler et al [11] do not provide information about the likely underlying mechanism or sources of their effects (see [28] this issue for discussion). We highlight the above shortcomings to emphasize the necessity for the stimulus battery developed in the present study, as well as the continued investigation of the spatio-temporal dynamics of auditory-induced emotion processing.…”

Section: Short-duration Emotional Sound Batterymentioning

confidence: 98%

Emotional Pre-eminence of Human Vocalizations

et al. 2008

Self Cite

View full text Add to dashboard Cite

Human vocalizations (HV), as well as environmental sounds, convey a wide range of information, including emotional expressions. The latter have been relatively rarely investigated, and, in particular, it is unclear if duration-controlled non-linguistic HV sequences can reliably convey both positive and negative emotional information. The aims of the present psychophysical study were: (i) to generate a battery of duration-controlled and acoustically controlled extreme valence stimuli, and (ii) to compare the emotional impact of HV with that of other environmental sounds. A set of 144 HV and other environmental sounds was selected to cover emotionally positive, negative, and neutral values. Sequences of 2 s duration were rated on Likert scales by 16 listeners along three emotional dimensions (arousal, intensity, and valence) and two non-emotional dimensions (confidence in identifying the sound source and perceived loudness). The 2 s stimuli were reliably perceived as emotionally positive, negative or neutral. We observed a linear relationship between intensity and arousal ratings and a ''boomerangshaped'' intensity-valence distribution, as previously reported for longer, duration-variable stimuli. In addition, the emotional intensity ratings for HV were higher than for other environmental sounds, suggesting that HV constitute a characteristic class of emotional auditory stimuli. In addition, emotionally positive HV were more readily identified than other sounds, and emotionally negative stimuli, irrespective of their source, were perceived as louder than their positive and neutral counterparts. In conclusion, HV are a distinct emotional category of environmental sounds and they retain this emotional preeminence even when presented for brief periods.

show abstract

Topographic ERP Analyses: A Step-by-Step Tutorial Review

Cited by 1,008 publications

References 67 publications

Auditory perceptual decision-making based on semantic categorization of environmental sounds

Auditory perceptual decision-making based on semantic categorization of environmental sounds

Comparing Electrophysiological Correlates of Word Production in Immediate and Delayed Naming Through the Analysis of Word Age of Acquisition Effects

Emotional Pre-eminence of Human Vocalizations

Contact Info

Product

Resources

About