Detection of experimental ERP effects in combined EEG–fMRI: Evaluating the benefits of interleaved acquisition and Independent Component Analysis

Lavric, Aureliu; Bregadze, Nino; Benattayallah, Abdelmalek

doi:10.1016/j.clinph.2010.06.033

Cited by 7 publications

(5 citation statements)

References 35 publications

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“…Peak amplitudes of the N170 in the study and recognition phases were examined for differences between the experimental conditions. To improve the estimates of N170 amplitude and latency given the relatively small number of ERP segments in each condition (leading to a low signal-to-noise ratio), we used independent component analysis (ICA; Bell & Sejnowski, 1995; for the application of ICA for the identification of ERP components, see Debener et al, 2005, andLavric, Bregadze, &Benattayallah, 2010) to aid N170 extraction by linear decomposition of the EEG. ICA is predicated on the assumption that the EEG at each electrode represents a mixture of temporally independent signals (components).…”

Section: Methodsmentioning

confidence: 99%

Perceptual learning and inversion effects: Recognition of prototype-defined familiar checkerboards.

Civile¹,

Zhao²,

Ku³

et al. 2014

Journal of Experimental Psychology: Animal Learning and Cogniti

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The face inversion effect is a defection in performance in recognizing inverted faces compared with faces presented in their usual upright orientation typically believed to be specific for facial stimuli. McLaren (1997) was able to demonstrate that (a) an inversion effect could be obtained with exemplars drawn from a familiar category, such that upright exemplars were better discriminated than inverted exemplars; and (b) that the inversion effect required that the familiar category be prototype-defined. In this article, we replicate and extend these findings. We show that the inversion effect can be obtained in a standard old/new recognition memory paradigm, demonstrate that it is contingent on familiarization with a prototype-defined category, and establish that the effect is made up of two components. We confirm the advantage for upright exemplars drawn from a familiar, prototype-defined category, and show that there is a disadvantage for inverted exemplars drawn from this category relative to suitable controls. We also provide evidence that there is an N170 event-related potential signature for this effect. These results allow us to integrate a theory of perceptual learning originally proposed by McLaren, Kaye, and Mackintosh (1989) with explanations of the face inversion effect, first reported by Yin.

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Section: Methodsmentioning

confidence: 99%

Perceptual learning and inversion effects: Recognition of prototype-defined familiar checkerboards.

Civile¹,

Zhao²,

Ku³

et al. 2014

Journal of Experimental Psychology: Animal Learning and Cogniti

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“…Analyzer, BrainProducts, Munich, Germany); previous work in our laboratory has documented the benefits of ICA in ERP analysis (Lavric, Bregadze & Benattayallah, 2010). The independent components extracted by ICA from every participant's EEG were inspected and those with characteristic eye-blink and eye-movement topographies were subtracted from the EEG.…”

Section: In Visionmentioning

confidence: 99%

Processing Differences Across Regular and Irregular Inflections Revealed Through ERPs

Rastle¹,

Lavric²,

Elchlepp³

et al. 2014

PsycEXTRA Dataset

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“…Indeed, in studies in which word primes are used (as is the case here), orthographic priming effects are typically nonsignificant or even inhibitory, as opposed to the strong facilitation observed in the case of morphological primes. Rastle and Davis (2008) reviewed 14 studies that assessed masked morphological priming against an orthographic baseline; these studies yielded an average masked morphological priming effect of 30 ms and an average masked orthographic priming effect of 2 ms (see also e.g., Crepaldi et al, Lavric et al, 2007, 2011; Longtin et al, 2003; McCormick et al, 2008; Rastle et al, 2004). This pattern is also true in ERP measures of masked priming, where morphological priming is reliably distinguished from orthographic priming (Lavric et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Off-line, the EEG was low-pass filtered (20 Hz; 48 dB/octave) and rereferenced to the average of the two earlobe electrodes. The EEG was corrected for eyeblink and eye-movement artifacts using Independent Component Analysis (Infomax ICA, Bell & Sejnowski, 1995, implemented in Vision Analyzer, BrainProducts, Munich, Germany); previous work in our laboratory has documented the benefits of ICA in ERP analysis (Lavric, Bregadze & Benattayallah, 2011). The independent components extracted by ICA from every participant’s EEG were inspected and those with characteristic eyeblink and eye-movement topographies were subtracted from the EEG.…”

Section: Methodsmentioning

confidence: 99%

“…Critically, priming in both of these cases is greater than that observed when there is a simple orthographic relation between primes and targets (e.g., brothel–BROTH), confirming the morphological nature of the effect (Longtin et al, 2003; Rastle et al, 2004; Kazanina et al, 2008; McCormick et al, 2008; see Rastle & Davis, 2008 for review). fMRI and electrophysiological data provide strong converging evidence for a morphological segmentation process insensitive to semantic factors (Gold & Rastle, 2007; Lavric et al, 2007, 2011; 2012; Morris et al, 2013) that arises within around 190 ms of stimulus onset (Lavric et al, 2012).…”

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confidence: 96%

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Processing differences across regular and irregular inflections revealed through ERPs.

Rastle¹,

Lavric²,

Elchlepp³

et al. 2015

Journal of Experimental Psychology: Human Perception and Perfor

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Research strongly suggests that printed words are recognized in terms of their constituent morphemes, but researchers have tended to consider the recognition of derivations and inflections in separate theoretical debates. Recently, Crepaldi et al. (2010) proposed a theory that claims to account for the recognition of both derivations and inflections. We investigated brain potentials in the context of masked priming to test 2 key predictions of this theory: (a) that regular inflections should prime their stems to a greater degree than irregular inflections should prime their stems and (b) that priming for regular inflections should arise earlier in the recognition process than priming for irregular inflections. Significant masked priming effects were observed for both regular and irregular inflections, though these effects were greater for regular inflections. ERP data further suggested that masked priming effects for regular and irregular inflections had different time courses. Priming for regular but not irregular inflections emerged in a time window reflecting processing up to 250 ms post target onset, and although priming for regular and irregular inflections was observed in a time window reflecting processing 400 to 600 ms post target onset, these effects arose earlier and were of greater magnitude for the regular inflections. These findings support a form-then-meaning characterization of the visual word processing system such as that proposed by Crepaldi et al. (2010) and raise challenges for alternative approaches.

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Detection of experimental ERP effects in combined EEG–fMRI: Evaluating the benefits of interleaved acquisition and Independent Component Analysis

Cited by 7 publications

References 35 publications

Perceptual learning and inversion effects: Recognition of prototype-defined familiar checkerboards.

Perceptual learning and inversion effects: Recognition of prototype-defined familiar checkerboards.

Processing Differences Across Regular and Irregular Inflections Revealed Through ERPs

Processing differences across regular and irregular inflections revealed through ERPs.

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