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Crawcour, Stephen; Bowers, Andrew; Harkrider, Ashley; Saltuklaroglu, Tim – Neuropsychologia, 2009
Motor involvement in speech perception has been recently studied using a variety of techniques. In the current study, EEG measurements from Cz, C3 and C4 electrodes were used to examine the relative power of the mu rhythm (i.e., 8-13 Hz) in response to various audio-visual speech and non-speech stimuli, as suppression of these rhythms is…
Descriptors: Psychomotor Skills, Auditory Perception, Visual Perception, Speech
Sheldon, Claire A.; Abegg, Mathias; Sekunova, Alla; Barton, Jason J. S. – Neuropsychologia, 2012
A word-length effect is often described in pure alexia, with reading time proportional to the number of letters in a word. Given the frequent association of right hemianopia with pure alexia, it is uncertain whether and how much of the word-length effect may be attributable to the hemifield loss. To isolate the contribution of the visual field…
Descriptors: Reading Comprehension, Rehabilitation Programs, Eye Movements, Models
Schuett, Susanne; Heywood, Charles A.; Kentridge, Robert W.; Zihl, Josef – Neuropsychologia, 2008
We present the first comprehensive review of research into hemianopic dyslexia since Mauthner's original description of 1881. We offer an explanation of the reading impairment in patients with unilateral homonymous visual field disorders and clarify its functional and anatomical bases. The major focus of our review is on visual information…
Descriptors: Dyslexia, Patients, Cognitive Processes, Visual Stimuli
Acres, K.; Taylor, K. I.; Moss, H. E.; Stamatakis, E. A.; Tyler, L. K. – Neuropsychologia, 2009
Cognitive neuroscientific research proposes complementary hemispheric asymmetries in naming and recognising visual objects, with a left temporal lobe advantage for object naming and a right temporal lobe advantage for object recognition. Specifically, it has been proposed that the left inferior temporal lobe plays a mediational role linking…
Descriptors: Neurological Impairments, Semantics, Patients, Brain Hemisphere Functions
Wan, Catherine Y.; Wood, Amanda G.; Reutens, David C.; Wilson, Sarah J. – Neuropsychologia, 2010
Previous studies have shown that in comparison with the sighted, blind individuals display superior non-visual perceptual abilities and differ in brain organisation. In this study, we investigated the performance of blind and sighted participants on a vibrotactile discrimination task. Thirty-three blind participants were classified into one of…
Descriptors: Blindness, Braille, Congenital Impairments, Perceptual Development
Hesse, Constanze; Franz, Volker H. – Neuropsychologia, 2009
The availability of visual information influences the execution of goal-directed movements. This is very prominent in memory conditions, where a delay is introduced between stimulus presentation and execution of the movement. The corresponding effects could be due to a decay of the visual information or to different processing mechanisms used for…
Descriptors: Memory, Perceptual Motor Coordination, Visual Perception, Vision
Almeida, Renita A.; Dickinson, J. Edwin; Maybery, Murray T.; Badcock, Johanna C.; Badcock, David R. – Neuropsychologia, 2010
The Embedded Figures Test (EFT) requires detecting a shape within a complex background and individuals with autism or high Autism-spectrum Quotient (AQ) scores are faster and more accurate on this task than controls. This research aimed to uncover the visual processes producing this difference. Previously we developed a search task using radial…
Descriptors: Autism, Visual Perception, Cues, Reaction Time
Vocat, Roland; Pourtois, Gilles; Vuilleumier, Patrik – Neuropsychologia, 2011
Errors generate typical brain responses, characterized by two successive event-related potentials (ERP) following incorrect action: the error-related negativity (ERN) and the positivity error (Pe). However, it is unclear whether these error-related responses are sensitive to the magnitude of the error, or instead show all-or-none effects. We…
Descriptors: Cognitive Processes, Brain Hemisphere Functions, Diagnostic Tests, Error Patterns
Bi, Yanchao; Han, Zaizhu; Zhang, Yumei – Neuropsychologia, 2009
A recent hypothesis proposes that reading depends on writing in a logographic language--Chinese. We present a Chinese individual (HLD) with brain damage whose profile challenges this hypothesis. HLD was severely impaired in the whole process of writing. He could not access orthographic knowledge, had poor orthographic awareness, and was poor at…
Descriptors: Spelling, Phonology, Neurological Impairments, Semantics
Pellicano, Elizabeth; Gibson, Lisa Y. – Neuropsychologia, 2008
Numerous reports of elevated global motion thresholds across a variety of neurodevelopmental disorders have prompted researchers to suggest that abnormalities in global motion perception are a result of a general deficiency in the dorsal visual pathway. To test this hypothesis, we assessed the integrity of the dorsal visual pathway at lower…
Descriptors: Autism, Dyslexia, Integrity, Motion
Animate and Inanimate Objects in Human Visual Cortex: Evidence for Task-Independent Category Effects
Wiggett, Alison J.; Pritchard, Iwan C.; Downing, Paul E. – Neuropsychologia, 2009
Evidence from neuropsychology suggests that the distinction between animate and inanimate kinds is fundamental to human cognition. Previous neuroimaging studies have reported that viewing animate objects activates ventrolateral visual brain regions, whereas inanimate objects activate ventromedial regions. However, these studies have typically…
Descriptors: Visual Stimuli, Tests, Neuropsychology, Brain Hemisphere Functions
Heine, Angela; Tamm, Sascha; Wissmann, Jacqueline; Jacobs, Arthur M. – Neuropsychologia, 2011
Whether and in what way enumeration processes differ for small and large sets of objects is still a matter of debate. In order to shed light on this issue, EEG data were obtained from 60 normally developing elementary school children. Adopting a standard non-symbolic numerical comparison paradigm allowed us to manipulate numerical distance between…
Descriptors: Children, Elementary School Students, Numbers, Medicine
Kensinger, Elizabeth A.; Schacter, Daniel L. – Neuropsychologia, 2007
Memories can be retrieved with varied amounts of visual detail, and the emotional content of information can influence the likelihood that visual detail is remembered. In the present fMRI experiment (conducted with 19 adults scanned using a 3T magnet), we examined the neural processes that correspond with recognition of the visual details of…
Descriptors: Evidence, Stimuli, Imagery, Cognitive Processes
Kim, Esther S.; Rapcsak, Steven Z.; Andersen, Sarah; Beeson, Pelagie M. – Neuropsychologia, 2011
Letter-by-letter (LBL) reading is the phenomenon whereby individuals with acquired alexia decode words by sequential identification of component letters. In cases where letter recognition or letter naming is impaired, however, a LBL reading approach is obviated, resulting in a nearly complete inability to read, or global alexia. In some such…
Descriptors: Dyslexia, Kinesthetic Methods, Therapy, Outcomes of Treatment
Hunter, Zoe R.; Brysbaert, Marc – Neuropsychologia, 2008
Traditional neuropsychology employs visual half-field (VHF) experiments to assess cerebral language dominance. This approach is based on the assumption that left cerebral dominance for language leads to faster and more accurate recognition of words in the right visual half-field (RVF) than in the left visual half-field (LVF) during tachistoscopic…
Descriptors: Lateral Dominance, Brain Hemisphere Functions, Word Recognition, Neuropsychology