J P Hamm

Summary

Affiliation: University of Auckland
Country: New Zealand

Publications

  1. doi request reprint Stimulus-response compatibilities during top-bottom discriminations
    Phil Light
    Department of Psychology, University of Auckland, New Zealand
    Can J Exp Psychol 62:81-90. 2008
  2. doi request reprint The effects of inverting natural stimuli in a flanker task
    Ian C Wells
    Department of Psychology, University of Auckland, Auckland, New Zealand
    Can J Exp Psychol 63:33-9. 2009
  3. ncbi request reprint Comparison of the N300 and N400 ERPs to picture stimuli in congruent and incongruent contexts
    Jeff P Hamm
    Department of Psychology, Centre for Cognitive Neuroscience, University of Auckland, Auckland, New Zealand
    Clin Neurophysiol 113:1339-50. 2002
  4. ncbi request reprint One good turn deserves another: an event-related brain potential study of rotated mirror-normal letter discriminations
    Jeff P Hamm
    Department of Psychology, Research Centre for Cognitive Neuroscience, University of Auckland, Private Bag 92019, Auckland, New Zealand
    Neuropsychologia 42:810-20. 2004
  5. ncbi request reprint Object-oriented millisecond timers for the PC
    J P Hamm
    Department of Pschology, Private Bag 92019, University of Auckland, Auckland, New Zealand
    Behav Res Methods Instrum Comput 33:532-9. 2001
  6. ncbi request reprint Does attention follow the motion in the "shooting line" illusion?
    Jeff P Hamm
    Department of Psychology, University of Auckland, New Zealand
    Percept Psychophys 64:279-91. 2002
  7. ncbi request reprint Neurophysiological responses to face, facial regions and objects in adults with Asperger's syndrome: an ERP investigation
    Kate O'Connor
    Department of Psychology, University of Auckland, Auckland, New Zealand
    Int J Psychophysiol 63:283-93. 2007
  8. doi request reprint Functional neuroanatomy of mental rotation
    Branka Milivojevic
    University of Auckland, New Zealand
    J Cogn Neurosci 21:945-59. 2009
  9. ncbi request reprint Perceptual and motor mechanisms for mental rotation of human hands
    Z C Thayer
    Department of Psychology, Private Bag 92019, University of Auckland, Auckland, New Zealand
    Neuroreport 12:3433-7. 2001
  10. ncbi request reprint Early visual evoked potentials in callosal agenesis
    Melodie S Barr
    Research Centre for Cognitive Neuroscience, Department of Psychology, University of Auckland, Auckland, New Zealand
    Neuropsychology 19:707-27. 2005

Detail Information

Publications41

  1. doi request reprint Stimulus-response compatibilities during top-bottom discriminations
    Phil Light
    Department of Psychology, University of Auckland, New Zealand
    Can J Exp Psychol 62:81-90. 2008
    ..This task appears to reflect spatial stimulus-response compatibilities more than object processing...
  2. doi request reprint The effects of inverting natural stimuli in a flanker task
    Ian C Wells
    Department of Psychology, University of Auckland, Auckland, New Zealand
    Can J Exp Psychol 63:33-9. 2009
    ..These produced a reliable FCE for only upright flankers. The results are discussed in line with structural categorisation of stimuli being invariant of object orientation...
  3. ncbi request reprint Comparison of the N300 and N400 ERPs to picture stimuli in congruent and incongruent contexts
    Jeff P Hamm
    Department of Psychology, Centre for Cognitive Neuroscience, University of Auckland, Auckland, New Zealand
    Clin Neurophysiol 113:1339-50. 2002
    ..Based upon theories of object identification, the semantic incongruity was manipulated to occur early or late in the object processing stream...
  4. ncbi request reprint One good turn deserves another: an event-related brain potential study of rotated mirror-normal letter discriminations
    Jeff P Hamm
    Department of Psychology, Research Centre for Cognitive Neuroscience, University of Auckland, Private Bag 92019, Auckland, New Zealand
    Neuropsychologia 42:810-20. 2004
    ..It is this additional rotation that produces, at least in part, the delayed response times for mirror-image stimuli...
  5. ncbi request reprint Object-oriented millisecond timers for the PC
    J P Hamm
    Department of Pschology, Private Bag 92019, University of Auckland, Auckland, New Zealand
    Behav Res Methods Instrum Comput 33:532-9. 2001
    ..The object also is able to store the time of a flagged event for later examination without interrupting the ongoing timing operation...
  6. ncbi request reprint Does attention follow the motion in the "shooting line" illusion?
    Jeff P Hamm
    Department of Psychology, University of Auckland, New Zealand
    Percept Psychophys 64:279-91. 2002
    ..This pattern was not shown when the line preceded the cue, strongly suggesting that attention follows the motion in this illusion...
  7. ncbi request reprint Neurophysiological responses to face, facial regions and objects in adults with Asperger's syndrome: an ERP investigation
    Kate O'Connor
    Department of Psychology, University of Auckland, Auckland, New Zealand
    Int J Psychophysiol 63:283-93. 2007
    ..This difference was not observed to objects. Together these findings suggest that adults with AS may be slower to process facial information...
  8. doi request reprint Functional neuroanatomy of mental rotation
    Branka Milivojevic
    University of Auckland, New Zealand
    J Cogn Neurosci 21:945-59. 2009
    ....
  9. ncbi request reprint Perceptual and motor mechanisms for mental rotation of human hands
    Z C Thayer
    Department of Psychology, Private Bag 92019, University of Auckland, Auckland, New Zealand
    Neuroreport 12:3433-7. 2001
    ....
  10. ncbi request reprint Early visual evoked potentials in callosal agenesis
    Melodie S Barr
    Research Centre for Cognitive Neuroscience, Department of Psychology, University of Auckland, Auckland, New Zealand
    Neuropsychology 19:707-27. 2005
    ..Suggestions are made as to why these results differ from earlier findings and as to the neural mechanisms facilitating this ipsilateral activation...
  11. ncbi request reprint The effects of redundant stimuli on visuospatial processing in developmental dyslexia
    Gjurgjica Badzakova-Trajkov
    Department of Psychology, Research Centre for Cognitive Neuroscience, University of Auckland, Private Bag 92019, Auckland, New Zealand
    Neuropsychologia 43:473-8. 2005
    ..This asymmetry was not found in age- and IQ-matched control children. The results are at least partially consistent with the notion of phonological dyslexia involving deficits in the transfer of information across the corpus callosum...
  12. ncbi request reprint Spatial frequency-specific potentiation of human visual-evoked potentials
    Nicolas A McNair
    Research Centre for Cognitive Neuroscience, University of Auckland, New Zealand
    Neuroreport 17:739-41. 2006
    ..These results suggest that the long-term potentiation effect induced by the sensory tetanus is isolated to a discrete neural population in the visual cortex...
  13. doi request reprint Orientation sensitivity of the N1 evoked by letters and digits
    Branka Milivojevic
    Department of Psychology, University of Auckland, Auckland, New Zealand
    J Vis 8:11.1-14. 2008
    ..The effects of orientation were attributed to perceptual learning rather than object recognition, and the hemispheric differences in N1 latency suggest feature-based processing in the left hemisphere and holistic processing in the right...
  14. ncbi request reprint Effects of orientation on the identification of rotated objects depend on the level of identity
    J P Hamm
    Department of Psychology, Dalhousie University, Halifax, Nova Scotia, Canada
    J Exp Psychol Hum Percept Perform 24:413-26. 1998
    ..They consequently fail to support theories of object recognition in which rotated object images are normalized to the upright position before contact with long-term object representations...
  15. ncbi request reprint Temporal dynamics of masked word reading
    Scott L Fairhall
    Research Centre for Cognitive Neuroscience, Department of Psychology, The University of Auckland, Auckland, New Zealand
    Conscious Cogn 16:112-23. 2007
    ..The evoked response demonstrates a qualitatively distinct signature of unconscious cognition and directly demonstrates the extraction of abstract information under subliminal conditions...
  16. ncbi request reprint Decreased desychronisation during self-paced movements in frequency bands involving sensorimotor integration and motor functioning in Parkinson's disease
    Vanessa K Lim
    Department of Psychology, Research Centre for Cognitive Neuroscience, The University of Auckland, Private Bag 92019, Auckland, New Zealand
    Brain Res Bull 71:245-51. 2006
    ..This activity difference in patients with Parkinson's disease may be due to deficits in sensorimotor integration...
  17. ncbi request reprint Kinesthetic but not visual imagery assists in normalizing the CNV in Parkinson's disease
    Vanessa K Lim
    Department of Psychology, Research Centre for Cognitive Neuroscience, The University of Auckland, Private Bag 92019, Auckland, New Zealand
    Clin Neurophysiol 117:2308-14. 2006
    ..This study investigated whether kinesthetic and/or visual imagery could alter the contingent negative variation (CNV) for patients with Parkinson's disease (PD)...
  18. doi request reprint Semantic processing of mathematical gestures
    Vanessa K Lim
    Department of Psychology, Research Centre for Cognitive Neuroscience, The University of Auckland, Auckland, New Zealand
    Brain Cogn 71:306-12. 2009
    ..This suggests that mathematical function words are processed by the general language semantic system and do not appear to involve areas involved in other mathematical concepts (e.g. numerosity)...
  19. ncbi request reprint Differences in paper-and-pencil versus computerized line bisection according to ADHD subtype and hand-use
    Mei Hsin Suzanne Rolfe
    Centre for Cognitive Neuroscience, Department of Psychology, University of Auckland, Private Bag 92019, Auckland, New Zealand
    Brain Cogn 66:188-95. 2008
    ..The findings also suggest that the two subtypes differ according to their cognitive profile, and possibly differ as to their underlying neural impairment...
  20. doi request reprint Binocular rivalry reveals a dissociation between the subjective experience and induced gamma oscillations
    Scott L Fairhall
    Research Centre for Cognitive Neuroscience, Department of Psychology, The University of Auckland, Private Bag 92019, Auckland, New Zealand
    Eur J Neurosci 27:213-6. 2008
    ..These results suggest that localized scalp-recorded gamma oscillations are dissociable from the subjective visual experience...
  21. doi request reprint Induction of orientation-specific LTP-like changes in human visual evoked potentials by rapid sensory stimulation
    Robert M Ross
    Research Centre for Cognitive Neuroscience, University of Auckland, Auckland, New Zealand
    Brain Res Bull 76:97-101. 2008
    ..Furthermore, our results support earlier studies that have suggested that the locus of potentiation induced by rapid visual stimulation is visual cortex...
  22. ncbi request reprint Long-term enhanced desynchronization of the alpha rhythm following tetanic stimulation of human visual cortex
    Wesley C Clapp
    Psychology Department, City Campus, Centre for Cognitive Neuroscience, University of Auckland, Private Bag 92019, Auckland, New Zealand
    Neurosci Lett 398:220-3. 2006
    ..Because ERD of the alpha rhythm is thought to represent active cortex, these results suggest that the visual tetanus induces long-lasting cortical changes, with stronger neuronal assemblies and increased neuronal output...
  23. ncbi request reprint Volition and the idle cortex: beta oscillatory activity preceding planned and spontaneous movement
    Scott L Fairhall
    Research Centre for Cognitive Neuroscience, Department of Psychology, The University of Auckland, Auckland, New Zealand
    Conscious Cogn 16:221-8. 2007
    ..A model is considered where by distributed neural activity remains outside of conscious awareness through the persistence of tonic slow wave cortical oscillations...
  24. ncbi request reprint Anterior-posterior beta asymmetries in dyslexia during lexical decisions
    R Duncan Milne
    Department of Psychology, Private Bag 92019, University of Auckland, New Zealand
    Brain Lang 84:309-17. 2003
    ..Our results therefore suggest compensation through weakness rather than strength, with phonological dyslexics focusing on a grapheme-to-phoneme strategy and dyseidetics focusing on visual word identification...
  25. ncbi request reprint Cerebral asymmetry for mental rotation: effects of response hand, handedness and gender
    Blake W Johnson
    Department of Psychology, University of Auckland, New Zealand
    Neuroreport 13:1929-32. 2002
    ..However, left hemisphere resources may be allocated to response preparation when using the non-dominant hand, forcing visuo-spatial processing to the right hemisphere...
  26. ncbi request reprint A high density ERP comparison of mental rotation and mental size transformation
    Suresh D Muthukumaraswamy
    Research Centre for Cognitive Neuroscience, Department of Psychology, University of Auckland, Auckland, New Zealand
    Brain Cogn 52:271-80. 2003
    ..However, the superior temporal resolution of the present data indicates that BA 19 activation may occur at a latency that is more likely related to apparent motion than to the size-transformation operation per se...
  27. ncbi request reprint Sex hormonal modulation of hemispheric asymmetries in the attentional blink
    Antje Holländer
    Department of Psychology, University of Auckland, Auckland, New Zealand
    J Int Neuropsychol Soc 11:263-72. 2005
    ..This effect appears to be mediated by estradiol rather than progesterone, and it is compatible with the assumption of a hormone-related suppression of right hemisphere functions during the midluteal phase...
  28. ncbi request reprint Paradoxical interhemispheric summation in the split brain
    Michael C Corballis
    Research Centre for Cognitive Neuroscience, University of Auckland, New Zealand
    J Cogn Neurosci 14:1151-7. 2002
    ....
  29. ncbi request reprint Effects of long-term potentiation in the human visual cortex: a functional magnetic resonance imaging study
    Wesley C Clapp
    Research Centre for Cognitive Neuroscience, University of Auckland, Auckland, New Zealand
    Neuroreport 16:1977-80. 2005
    ..These results support the idea that long-term potentiation can be demonstrated non-invasively within the human visual cortex and provide evidence that the plastic changes are localized within the secondary visual cortex...
  30. ncbi request reprint The neurophysiological correlates of face processing in adults and children with Asperger's syndrome
    Kate O'Connor
    Research Centre for Cognitive Neuroscience, Department of Psychology, University of Auckland, Auckland, New Zealand
    Brain Cogn 59:82-95. 2005
    ..However, these differences were not observed between AS and control children. This may result from incomplete development of the neuronal generators of these ERP components and/or early intervention...
  31. ncbi request reprint High-density mapping in an N400 paradigm: evidence for bilateral temporal lobe generators
    B W Johnson
    Department of Psychology, University of Auckland, Auckland, New Zealand
    Clin Neurophysiol 111:532-45. 2000
    ..The aim of this study was to obtain a more detailed description of N400 scalp topography than has previously been reported...
  32. ncbi request reprint Visual-field asymmetry in dual-stream RSVP
    Antje Holländer
    Department of Psychology, University of Auckland, Private Bag 92019, Auckland, New Zealand
    Neuropsychologia 43:35-40. 2005
    ..The left-visual-field advantage in performing the AB task may reflect a general right-hemispheric specialization for attentional processing...
  33. doi request reprint The neural networks involved in pitch labeling of absolute pitch musicians
    Carolyn Wu
    Department of Psychology, Research Centre for Cognitive Neuroscience RCCN, University of Auckland, Auckland, New Zealand
    Neuroreport 19:851-4. 2008
    ..This suggests that when required to label tones without an external reference, absolute pitch musicians have the ability to recruit a greater network than nonabsolute pitch musicians or nonmusicians...
  34. doi request reprint A model of rotated mirror/normal letter discriminations
    Eva Kung
    University of Auckland, Auckland, New Zealand 1142
    Mem Cognit 38:206-20. 2010
    ..On the basis of the present findings, the entire RT function can be modeled by using only the mean RTs for upright and inverted stimuli...
  35. ncbi request reprint Non-identical neural mechanisms for two types of mental transformation: event-related potentials during mental rotation and mental paper folding
    B Milivojevic
    Department of Psychology, University of Auckland, Private Bag 92019, Auckland, New Zealand
    Neuropsychologia 41:1345-56. 2003
    ..This task-dependent lability of hemispheric function may account for some of the inconsistent results reported by previous neuroimaging and electrophysiological studies...
  36. ncbi request reprint Induction of LTP in the human auditory cortex by sensory stimulation
    W C Clapp
    Psychology Department, and Research Centre for Cognitive Neuroscience, City Campus, University of Auckland, Private Bag 92019 Auckland, New Zealand
    Eur J Neurosci 22:1135-40. 2005
    ..This is the first demonstration of the induction of long-lasting plastic changes in AEPs, and suggest that this represents the first direct demonstration of long-term potentiation in the auditory cortex of normal, intact humans...
  37. doi request reprint Impaired sensorimotor integration in focal hand dystonia patients in the absence of symptoms
    C Carolyn Wu
    Department of Psychology, Research Centre for Cognitive Neuroscience, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand
    J Neurol Neurosurg Psychiatry 81:659-65. 2010
    ..Thus, in order to characterise impairments in patients with FHD during movements that do not induce dystonic symptoms, we investigated the neural correlates of externally paced finger tapping movements...
  38. ncbi request reprint The role of axes of elongation and symmetry in rotated object naming
    Mary Ellen Large
    Department of Psychology, Dalhousie University, Halifax, Nova Scotia, Canada
    Percept Psychophys 65:1-19. 2003
    ..Contrary to many theories, these findings relegate the axes of symmetry and elongation to relatively minor roles during object identification...
  39. ncbi request reprint Developmental changes in visual line bisection in women throughout adulthood
    Christian Beste
    Department of Biopsychology, Institute for Cognitive Neuroscience, Ruhr University Bochum, D 44780 Bochum, Germany
    Dev Neuropsychol 30:753-67. 2006
    ..The results suggest that developmental changes in hemispheric asymmetry of spatial attention are more pronounced in women and support the view that neuromorphological changes during adulthood differ between sexes...
  40. pmc Long-term potentiation of human visual evoked responses
    Timothy J Teyler
    Medical Education Program, University of Idaho, Moscow, ID and Department of Veterinary and Comparative Anatomy, Pharmacology and Physiology, Washington State University, Pullman, WA, USA
    Eur J Neurosci 21:2045-50. 2005
    ....
  41. ncbi request reprint Induction of LTP-like changes in human auditory cortex by rapid auditory stimulation: an FMRI study
    Tino Zaehle
    Department of Neuropsychology, Institute of Psychology, University of Zurich, Zurich, Switzerland
    Restor Neurol Neurosci 25:251-9. 2007
    ..The goal of the present study was to investigate potential effects of LTP-like changes on the hemodynamic response of the human auditory cortex...