The Experts below are selected from a list of 75 Experts worldwide ranked by ideXlab platform
Kent A Kiehl - One of the best experts on this subject based on the ideXlab platform.
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neuronal chronometry of target detection fusion of hemodynamic and event related potential data
NeuroImage, 2006Co-Authors: Vince D Calhoun, Tulay Adali, Godfrey D Pearlson, Kent A KiehlAbstract:Abstract Event-related potential (ERP) studies of the brain's Response to infrequent, target (oddball) stimuli elicit a sequence of physiological events, the most prominent and well studied being a complex, the P300 (or P3) peaking approximately 300 ms post-stimulus for simple stimuli and slightly later for more complex stimuli. Localization of the neural generators of the human oddball Response remains challenging due to the lack of a single imaging technique with good spatial and temporal resolution. Here, we use independent component analyses to fuse ERP and fMRI modalities in order to examine the dynamics of the auditory oddball Response with high spatiotemporal resolution across the entire brain. Initial activations in auditory and motor planning regions are followed by auditory association cortex and motor execution regions. The P3 Response is associated with brainstem, temporal lobe, and medial frontal activity and finally a late temporal lobe “Evaluative” Response. We show that fusing imaging modalities with different advantages can provide new information about the brain.
C. D. Gray - One of the best experts on this subject based on the ideXlab platform.
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Ranking or rating? Some data and their implications for the measurement of Evaluative Response
British Journal of Psychology, 1994Co-Authors: P. A. Russell, C. D. GrayAbstract:Two groups of 80 subjects rated 15 paintings on a five-point pleasingness scale in accordance with a ‘relative’ instruction, requiring them to compare the paintings with one another, or an ‘absolute’ instruction, requiring them to compare the paintings with other, familiar ‘anchor’ paintings. Each subject also ranked the paintings on pleasingness, either before or after doing the ratings. Within-subject correlations between ranks and ratings revealed that, for all but a small minority of subjects, there was a moderate to high level of correspondence between the two measures. There was a tendency for those subjects who had shown good correspondence between their ranks and their ratings to show a greater spread in their ratings. The relative instruction also produced a greater spread in subjects' ratings compared with the ratings obtained under the absolute instruction. The means of the ranks and the ratings that the subjects assigned to the individual paintings were highly correlated in both groups. The results are discussed in terms of the respective merits of ranking and rating procedures, and it is concluded that, where practical and statistical considerations permit, and where the items are highly discriminable, a ranking procedure has advantages. Where ranking is precluded, however, a rating procedure with ‘relative’ instructions offers some of the same desirable characteristics.
Godfrey D Pearlson - One of the best experts on this subject based on the ideXlab platform.
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neuronal chronometry of target detection fusion of hemodynamic and event related potential data
NeuroImage, 2006Co-Authors: Vince D Calhoun, Tulay Adali, Godfrey D Pearlson, Kent A KiehlAbstract:Abstract Event-related potential (ERP) studies of the brain's Response to infrequent, target (oddball) stimuli elicit a sequence of physiological events, the most prominent and well studied being a complex, the P300 (or P3) peaking approximately 300 ms post-stimulus for simple stimuli and slightly later for more complex stimuli. Localization of the neural generators of the human oddball Response remains challenging due to the lack of a single imaging technique with good spatial and temporal resolution. Here, we use independent component analyses to fuse ERP and fMRI modalities in order to examine the dynamics of the auditory oddball Response with high spatiotemporal resolution across the entire brain. Initial activations in auditory and motor planning regions are followed by auditory association cortex and motor execution regions. The P3 Response is associated with brainstem, temporal lobe, and medial frontal activity and finally a late temporal lobe “Evaluative” Response. We show that fusing imaging modalities with different advantages can provide new information about the brain.
Suresh Ramanathan - One of the best experts on this subject based on the ideXlab platform.
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Promotions Spontaneously Induce a Positive Evaluative Response
Journal of Consumer Psychology, 2006Co-Authors: Rebecca Walker Naylor, Rajagopal Raghunathan, Suresh RamanathanAbstract:Research has suggested that conscious cognitive processes mediate positive Responses to promotions. In contrast, we find that exposure to promotional stimuli evokes a positive Evaluative reaction spontaneously and that this reaction generalizes to products that are evaluated subsequently. Three experiments support our predictions and rule out alternative possibilities. Specifically, we find that promotions spontaneously evoke positive Evaluative Responses and that these Responses mediate liking for a target product. Our findings also identify conditions under which promotion-generated Evaluative Responses are transferred to products unrelated to the promotion and indicate the type of product categories that are likely to produce this effect. The theoretical and substantive implications of this research are discussed.
Vince D Calhoun - One of the best experts on this subject based on the ideXlab platform.
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neuronal chronometry of target detection fusion of hemodynamic and event related potential data
NeuroImage, 2006Co-Authors: Vince D Calhoun, Tulay Adali, Godfrey D Pearlson, Kent A KiehlAbstract:Abstract Event-related potential (ERP) studies of the brain's Response to infrequent, target (oddball) stimuli elicit a sequence of physiological events, the most prominent and well studied being a complex, the P300 (or P3) peaking approximately 300 ms post-stimulus for simple stimuli and slightly later for more complex stimuli. Localization of the neural generators of the human oddball Response remains challenging due to the lack of a single imaging technique with good spatial and temporal resolution. Here, we use independent component analyses to fuse ERP and fMRI modalities in order to examine the dynamics of the auditory oddball Response with high spatiotemporal resolution across the entire brain. Initial activations in auditory and motor planning regions are followed by auditory association cortex and motor execution regions. The P3 Response is associated with brainstem, temporal lobe, and medial frontal activity and finally a late temporal lobe “Evaluative” Response. We show that fusing imaging modalities with different advantages can provide new information about the brain.
