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Dr Trevor Crawford

Dr Trevor Crawford

Senior Lecturer

Fylde College
Lancaster University
Bailrigg
Lancaster
United Kingdom
LA1 4YF

+44 (0)1524 593761

Research Interests

  • Investigations of eye movements and neuropsychological test as diagnostic marker in Alzheimer's disease
  • Parkinson's disease, dyslexia & schizophrenia
  • Rehabilitation strategies for enhancing cognitive and motor function in Alzheimer's, Parkinson's disease
  • Eye movements and prefrontal executive systems in aging and development
  • Pharmacology of human eye movements (with Prof Deakin, Neuroscience Department, University of Manchester)
  • Negative priming, inhibitory control, working memory and executive function
  • Effects of emotion on  visual attention and face perception
  • Eye movements and dyslexia
  • Visual scanning strategies in cancer detection using x-ray images

General

Our health research  is  primarily targeted on age-related disorders in particular  Alzheimer’s disease. Parkinson's disease and Schizophrenia. We have two dedicated research laboratories at Lancaster University and an extensive network of collaboration hospitals and research centres in the north west and nationally. This research network includes research assistants, clinical psychologists, consultant neurologists, psychiatrists, radiologists and neuropsychologists at Lancaster University and Lancashire Teaching Hospitals.

Alzheimer's Disease

Our current research is aimed at developing new biological markers that will help doctors to improve their diagnosis of Alzheimer’s disease. The work in Dr Crawford’s lab, which is aimed at finding an early cognitive marker of the disease and tracking the objective changes in the severity of the illness, may enable these new treatments to be targeted at an early stage in the course of the disease. In this phase we have decided to focus our research on Alzheimer’s disease itself, rather than potential precursors to the disorder. In subsequent phases of the research program we will also include people who have not yet developed the disease but who are at high risk of developing a dementia. This would enable us to develop new programmes aimed at prevention and reversal of the disease process.

 Schizophrenia & Bipolar Disorder

Patients with schizophrenia are generally reported to perform poorly on a number of attentional tasks. Illusory line motion (ILM) occurs when one end of a static bar is presented in the vicinity of a recent attentional cue, such as a flashing box. Current research will be investigating whether patients with a psychotic illness, such as schizophrenia and  bipolar disorder, perceive illusory line motion in a similar fashion to healthy participants. Further studies are investigating the effects of emotional stimuli on attention elicited by visual cues.

Dyslexia

Low level computations that determine the size and direction of a rapid saccadic eye movement form an early component in skilled reading. Normal readers frequently fixate an intermediate point between the start and middle of a word. the natural tendency of the eye to target an optimal viewing location can be studied with single and double targets in non-linguistic displays. Our recent research has examined the saccadic eye movements of dyslexic and normal readers in response to displays of single and double targets. Eye movement analyses revealed no difference in the spacial position of saccadic eye movements of dyslexics and non-dyslexics in response to single targets presented at 5° or 10°. However, when presented with two targets simultaneously at 5° and 10°, in contrast to normal readers, who generated saccades to an intermediate position between the two targets (towards the 'centre-of-gravity'), dyslexics generated saccades that landed close to the near target eccentricity. These finding suggest that dyslexia is associated with a deficit in the processing of global spatial information for the control of saccadic eye movements. Our research program is continuing to explore this issue.

Trevor Crawford's Publications

2014

Neural correlates of illusory line motion: fMRI of ILM

Hamm , J., Crawford, T., Nebl , H., Kean , M., Williams , S. & Ettinger, U. 27/01/2014 In : PloS ONE. 9, 1, p. 1-11 11 p.

Research output: Contribution to journalJournal article

2013

The role of working memory and attentional disengagement in Inhibitory control: effects of aging and Alzheimer's disease

Crawford, T., Higham, S., Mayes, J., Dale, M., Shaunak, S. & Lekwuwa, G. 10/2013 In : AGE. 35, 5, p. 1637-1650 14 p.

Research output: Contribution to journalJournal article

Females and attention to eye gaze: effects of the menstrual cycle

Wolohan, F., Bennett, S. & Crawford, T. 06/2013 In : Experimental Brain Research. 227, 3, p. 379-386 8 p.

Research output: Contribution to journalJournal article

Illness beliefs and psychological outcome in people with Parkinson’s disease

Simpson, J., Lekwuwa, G. & Crawford, T. 06/2013 In : Chronic Illness. 9, 2, p. 165-176 12 p.

Research output: Contribution to journalJournal article

Alzheimer's disease: is the clue in the eyes?

Crawford, T. 02/2013 In : Neurodegenerative Disease Management. 3, 1, p. 5-7 3 p.

Research output: Contribution to journalEditorial

2012

The anti-orienting phenomenon revisited: Effects of gaze cues on antisaccade performance

Wolohan, F. & Crawford, T. 08/2012 In : Experimental Brain Research. 221, 4, p. 385-392 8 p.

Research output: Contribution to journalJournal article

Negative priming for target selection with saccadic eye movements

Donovan, T., Crawford, T. & Litchfield, D. 2012 In : Experimental Brain Research. 222, 4, p. 483-494 12 p.

Research output: Contribution to journalJournal article

2011

Is the relationship of prosaccade reaction times and antisaccade errors mediated by working memory?

Crawford, T. J., Parker, E., Solis-Trapala, I. & Mayes, J. 02/2011 In : Experimental Brain Research. 208, 3, p. 385-397 13 p.

Research output: Contribution to journalJournal article

2010

Self-esteem and self-disgust both mediate the relationship between dysfunctional cognitions and depressive symptoms

Simpson, J., Hillman, R., Crawford, T. & Overton, P. G. 12/2010 In : Motivation and Emotion. 34, 4, p. 399-406 8 p.

Research output: Contribution to journalJournal article

Viewing another person's eye movements improves identification of pulmonary nodules in chest x-ray inspection.

Litchfield, D., Ball, L. J., Donovan, T., Manning, D. J. & Crawford, T. 09/2010 In : Journal of Experimental Psychology: Applied. 16, 3, p. 251-262 12 p.

Research output: Contribution to journalJournal article

The perception of real and illusory motion in schizophrenia

Crawford, T. J., Hamm, J. P., Kean, M., Schmechtig, A., Kumari, V., Anilkumar, A. P. & Ettinger, U. 08/2010 In : Neuropsychologia. 48, 10, p. 3121-3127 7 p.

Research output: Contribution to journalJournal article

The capture of visual attention using auditory cues in schizophrenia

Kean, M., Crawford, T., Wolohan, F., Kumari, V. & Ettinger, U. 04/2010 In : Schizophrenia Research. 117, 2-3, p. 250-250 1 p.

Research output: Contribution to journalJournal article

2008

Learning from others : effects of viewing another person’s eye movements while searching for chest nodules.

Litchfield, D., Ball, L. J., Donovan, T., Manning, D. J. & Crawford, T. J. 6/03/2008 Proceedings of SPIE Medical Imaging: Image perception, Observer Performance and Technology Assesment. Sahiner, B. & Manning, D. J. (eds.). San Diego: SPIE, p. 691715

Research output: Contribution in Book/Report/ProceedingsChapter

Performance changes in lung nodule detection following perceptual feedback of eye movements.

Donovan, T., Manning, D. J. & Crawford, T. J. 5/03/2008 Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment. Sahiner, B. & Manning, D. J. (eds.). 6917 ed. USA: SPIE, p. 691703 (Proceedings of the SPIE)

Research output: Contribution in Book/Report/ProceedingsChapter

Cueing Visual Attention to Spatial Locations With Auditory Cues

Kean, M. & Crawford, T. 2008 In : Journal of Eye Movement Research. 2, 3, p. 1-13 13 p.

Research output: Contribution to journalJournal article

Learning from others: effects of viewing another person's eye movements while searching for chest nodules - art. no. 691715

Litchfield, D., Ball, L. J., Donovan, T., Manning, D. J. & Crawford, T. 2008 Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment. Sahiner, B. & Manning, D. J. (eds.). Bellingham, Wash.: SPIE-INT SOC OPTICAL ENGINEERING, p. 91715-91715 9 p.

Research output: Contribution in Book/Report/ProceedingsConference contribution

2006

Social support and psychological outcome in people with Parkinson's disease: Evidence for a specific pattern of associations

Simpson, J., Haines, K., Lekwuwa, G., Wardle, J. & Crawford, T. 11/2006 In : British Journal of Clinical Psychology. 45, 4, p. 585-590 6 p.

Research output: Contribution to journalJournal article

The relationship between eye movement and brain structural abnormalities in patients with schizophrenia and their unaffected relatives.

Schulze, K., MacCabe, J. H., Rabe-Hesketh, S., Crawford, T., Marshall, N., Zanelli, J., Walshe, M., Bramon, E., Murray, R. M. & McDonald, C. 10/2006 In : Journal of Psychiatric Research. 40, 7, p. 589-598 10 p.

Research output: Contribution to journalJournal article

How do radiologists do it? The influence of experience and training on searching for chest nodules.

Manning, D., Ethell, S., Donovan, T. & Crawford, T. 05/2006 In : Radiography.12, 2, p. 134-142 9 p.

Research output: Contribution to journalJournal article

Time-dependent observer errors in pulmonary nodule detection.

Manning, D., Barker-Mill, S. C., Donovan, T. & Crawford, T. 04/2006 In : British Journal of Radiology. 79, 940, p. 342-346 5 p.

Research output: Contribution to journalJournal article

Antisaccade Performance in Monozygotic Twins Discordant for Schizophrenia: The Maudsley Twin Study.

Ettinger, U., Picchioni, M., Hall, M-H., Schulze, K., Toulopoulou, T., Landau, S., Crawford, T. J. & Murray, R. M. 03/2006 In : American Journal of Psychiatry. 163, 3, p. 543-545 3 p.

Research output: Contribution to journalJournal article

The effects of illusory line motion on incongruent saccades: Implications for saccadic eye movements and visual attention.

Kean, M. R., Crawford, T. J., Hamm, J. P. & Klein, R. M. 1/01/2006 In : Experimental Brain Research. 173, p. 498-506 9 p.

Research output: Contribution to journalJournal article

Relationship between antisaccade and neuropsychological test performance and the role of IQ

Ettinger, U., Antonova, E., Halari, R., Kumar, A., Zachariah, E., Crawford, T., Mehrotra, R., Sharma, T. & Kumari, V. 01/2006 In : Schizophrenia Research. 81, 2-3, p. 216-216 1 p.

Research output: Contribution to journalJournal article

2005

The Inhibitory Effect of Recent Distracter.

Crawford, T. J., Higham, S. & Hill, S. 12/2005 In : Vision Research. 45, 27, p. 3365-3378 14 p.

Research output: Contribution to journalJournal article

Lack of association between prepulse inhibition and antisaccadic deficits in chronic schizophrenia: implications for identification of schizophrenia endophenotypes.

Kumari, V., Ettinger, U., Crawford, T. J., Zachariah, E. & Sharma, T. 05/2005 In : Journal of Psychiatric Research. 39, 3, p. 227-240 14 p.

Research output: Contribution to journalJournal article

Lack of association between prepulse inhibition and antisaccadic deficits in schizophrenia: Implications for identification of schizophrenia endophenotypes

Kumari, V., Ettinger, U., Crawford, T., Zachariah, E. & Sharme, T. 15/04/2005 In : Biological Psychiatry. 57, 8 Supplement, p. 105S-105S 1 p.

Research output: Contribution to journalJournal article

Structural neural correlates of prosaccade and antisaccade eye movements in healthy humans.

Ettinger, U., Antonova, E., Crawford, T. J., Mitterschiffthaler, M. T., Goswani, S., Sharma, T. & Kumari, V. 15/01/2005 In : NeuroImage. 24, 2, p. 487-494 8 p.

Research output: Contribution to journalJournal article

Inhibitory Control of Saccadic Eye Movements and Cognitive Impairment in Alzheimer's Disease.

Crawford, T. J., Higham, S., Patel, J. & Renvoize, T. 1/01/2005 In : Biological Psychiatry. 57, p. 1052-1060 9 p.

Research output: Contribution to journalJournal article

Saccadic eye movements, schizotypy, and the role of neuroticism.

Ettinger, U., Kumari, V., Crawford, T. J., Flak, V., Sharma, T., Davis, R. E. & Corr, P. J. 01/2005 In : Biological Psychology. 68, 1, p. 61-78 18 p.

Research output: Contribution to journalJournal article

A software framework for diagnostic medical image perception with feedback, and a novel perception visualisation technique

Phillips, P. W., Manning, D. J., Donovan, T., Crawford, T. & Higham, S. 2005 Medical Imaging 2005: Image Perception, Observer Performance, and Technology Assessment. Eckstein, M. P. & Jiang, Y. (eds.). Bellingham, Wash.: SPIE-INT SOC OPTICAL ENGINEERING, p. 572-580 9 p.

Research output: Contribution in Book/Report/ProceedingsConference contribution

The effect of feedback on performance in a fracture detection task.

Donovan, T., Manning, D. J., Philips, P. W., Higham, S. & Crawford, T. J. 2005 In : Progress in Biomedical Optics & Imaging (SPIE). 6, p. 79-85 7 p.

Research output: Contribution to journalJournal article

The effect of feedback on performance in fractured detection task.

Donovan, T., Manning, D. J., Philips, P. W., Higham, S. & Crawford, T. J. 2005 In : Proceedings of the SPIE medical imaging conference.

Research output: Contribution to journalJournal article

2004

The relationship between antisaccades, smooth pursuit, and executive dysfunction in first-episode schizophrenia.

Hutton, S. B., Huddy, V., Barnes, T. R. E., Robbins, T. W., Crawford, T. J., Kennard, C. & Joyce, E. M. 15/10/2004 In : Biological Psychiatry. 56, 8, p. 553-559 7 p.

Research output: Contribution to journalJournal article

Volumetric neural correlates of antisaccade eye movements in first-episode psychosis.

Ettinger, U., Kumari, V., Chitnis, X. A., Corr, P. J., Crawford, T. J., Fannon, D. G., O’Ceallaigh, S., Sumich, A. L., Doku, V. C. & Sharma, T. 10/2004 In : American Journal of Psychiatry. 161, 10, p. 1918-1921 4 p.

Research output: Contribution to journalJournal article

Smooth pursuit and antisaccade eye movements in siblings discordant for schizophrenia.

Ettinger, U., Kumari, V., Crawford, T. J., Corr, P. J., Das, M., Zachariah, E., Hughes, C., Sumich, A. L., Rabe-Hesketh, S. & Sharma, T. 03/2004 In : Journal of Psychiatric Research. 38, 2, p. 177-184 8 p.

Research output: Contribution to journalJournal article

2003

Effects of Procyclidine on Eye Movements in Schizophrenia.

Ettinger, U., Kumari, V., Zachariah, E., Galeas, A., Crawford, T. J., Corr, P. J., Taylor, D., Das, M. & Sharma, T. 12/2003 In : European Journal of Pharmacology. 28, 12, p. 2199-2208 10 p.

Research output: Contribution to journalJournal article

A quantitative investigation into women's experiences after a miscarriage : implications for the primary healthcare team.

Wong, M. K., Crawford, T., Gask, L. & Grinyer, A. 09/2003 In : British Journal of General Practice. 53, 494, p. 697-702 6 p.

Research output: Contribution to journalJournal article

Reliability of smooth pursuit, fixation, and saccadic eye movements.

Ettinger, U., Kumari, V., Crawford, T. J., Davis, R. E., Sharma, T. & Corr, P. J. 07/2003 In : Psychophysiology. 40, 4, p. 620-628 9 p.

Research output: Contribution to journalJournal article

2002

Differential effects of olanzapine and risperidone on cognition in schizophrenia? A saccadic eye movement study.

Broerse, A., Crawford, T. J. & Boer, J. A. 11/2002 In : Journal of Neuropsychiatry and Clinical Neurosciences. 14, 4, p. 454-460 7 p.

Research output: Contribution to journalJournal article

Relationship between brain structure and saccadic eye movements in healthy humans.

Ettinger, U., Kumari, V., Chitnis, X. A., Corr, P. J., Sumich, A. L., Rabe-Hesketh, S., Crawford, T. J. & Sharma, T. 16/08/2002 In : Neuroscience Letters. 328, 3, p. 225-228 4 p.

Research output: Contribution to journalJournal article

Cognition and the inhibitory control of saccades in Schizophrenia and Parkinson’s disease

Crawford, T. 2002 The brain's eye : neurobiological and clinical aspects of oculomotor research . Hyönä, J. (ed.). Amsterdam: Elsevier, Vol. 140, p. 449-466 18 p. (Progress in brain research; vol. 140)

Research output: Contribution in Book/Report/ProceedingsChapter (peer-reviewed)

2001

Short and long term effects of antipsychotic medication on smooth pursuit eye tracking in schizophrenia.

Hutton, S. B., Crawford, T. J., Gibbins, H., Cuthbert, I., Barnes, T., Kennard, C. & Joyce, E. 09/2001 In : Advances in Biochemical Psychopharmacology. 157, 3, p. 284-291 8 p.

Research output: Contribution to journalJournal article

Dyslexia and the centre-of-gravity effect.

Crawford, T. J. & Higham, S. 03/2001 In : Experimental Brain Research. 137, 1, p. 122-126 5 p.

Research output: Contribution to journalJournal article

Parsing Cognition in Schizophrenia Using Saccadic Eye Movements.

Crawford, T. J., Broerse, A. & den Boer, J. A. 1/01/2001 In : Neuropsychologia. 39, p. 742-756 15 p.

Research output: Contribution to journalJournal article

Saccadic hypometria in drug-naïve and drug-treated schizophrenic patients: A working memory deficit?

Hutton, S. B., Cuthbert, I., Crawford, T. J., Kennard, C., Barnes, T. R. E. & Joyce, E. M. 01/2001 In : Psychophysiology. 38, 1, p. 125-132 8 p.

Research output: Contribution to journalJournal article

Recent Saccadic Eye Movement Research Uncovers Patterns of Cognitive Dysfunction in Schizophrenia.

Crawford, T. J. & Broerse, A. 2001 In : Journal of Advances in Schizophrenia and Brain Research. 3, 2, p. 48-52 5 p.

Research output: Contribution to journalJournal article

2000

Smooth pursuit eye tracking over a structured background in first-episode schizophrenic patients.

Hutton, S. B., Crawford, T. J., Kennard, C., Barnes, T. R. E. & Joyce, E. M. 10/2000 In : European Archives of Psychiatry and Clinial Neuroscience. 250, 5, p. 221-225 5 p.

Research output: Contribution to journalJournal article

1999

Deficits of smooth pursuit initiation in patients with degenerative cerebellar lesions.

Moschner, C., Crawford, T. J., Heide, W., Trillenberg, P., Kömpf, D. & Kennard, C. 11/1999 In : Brain. 122, 11, p. 2147-2158 12 p.

Research output: Contribution to journalJournal article

Dopamine and impairment at the executive level.

Crawford, T. J., Broerse, A. & den Boer, J. A. 08/1999 In : Behavioral and Brain Sciences. 22, 4, p. 678-679 2 p.

Research output: Contribution to journalJournal article

Eye movement physiology : Saccadic hypometria in drug-naive and drug treated schizophrenia patients: a working memory deficit?

Hutton, S. B., Cuthbert, I., Crawford, T. J., Kennard, C., Barnes, T. R. E. & Joyce, E. 04/1999 In : Schizophrenia Research. 36, 1-3, p. 264-264 1 p.

Research output: Contribution to journalJournal article

Eye movement physiology: Smooth pursuit eye movements against a visually distracting background in schizophrenic probands and first degree relatives

Crawford, T. J., Sharma, T., Murray, R. & Lewis, S. 04/1999 In : Schizophrenia Research. 36, 1-3, p. 263-263 1 p.

Research output: Contribution to journalJournal article

Remembered saccades with variable delay in Parkinson’s disease.

Shaunak, S., O’Sullivan, E., Blunt, S., Lawden, M., Crawford, T. J., Henderson, L. & Kennard, C. 01/1999 In : Movement Disorders. 14, 1, p. 80-86 7 p.

Research output: Contribution to journalJournal article

1998

Smooth pursuit and saccadic abnormalities in first-episode schizophrenia.

Hutton, S., Crawford, T. J., Puri, B. K., Duncan, L-J., Kennard, C., Barnes, T. R. E. & Joyce, E. M. 05/1998 In : Psychological Medicine. 28, 3, p. 685-692 8 p.

Research output: Contribution to journalJournal article

Oculomotor abnormalities in first episode schizophrenic patients: a follow-up study.

Hutton, S. B., Crawford, T. J., Duncan, L-J., Chapman, M., Puri, B. K., Kennard, C., Barnes, T. R. E. & Joyce, E. M. 01/1998 In : Schizophrenia Research. 29, 1-2, p. 115-116 2 p.

Research output: Contribution to journalJournal article

The relationship between neuropsychological and oculomotor deficits in first episode schizophrenia.

Hutton, S. B., Crawford, T. J., Duncan, L-J., Chapman, M., Puri, B. K., Kennard, C., Robbins, T. R. E., Barnes, T. R. E. & Joyce, E. M. 01/1998 In : Schizophrenia Research. 29, 1-2, p. 52

Research output: Contribution to journalJournal article

Saccadic Eye Movements in Families Multiply Affected With Schizophrenia: The Maudsley Family Study.

Crawford, T. J., Sharma, T., Puri, B. K., Murray, R. M., Berridge, D. M. & Lewis, S. W. 1998 In : American Journal of Psychiatry. 155, 12, p. 1703-1710 8 p.

Research output: Contribution to journalJournal article

1997

Abnormalities of predictive saccades in Parkinson's disease.

O'Sullivan, E. P., Shaunak, S. S., Hawken, M. & Crawford, T. J. 1997 In : NeuroReport. 8, 5, p. 1209-1213 5 p.

Research output: Contribution to journalJournal article

1996

Transient motion of visual texture delays saccadic eye movements.

Crawford, T. J. 08/1996 In : Acta Psychologica. 92, 3, p. 251-262 12 p.

Research output: Contribution to journalJournal article

Abnormal saccadic distractibility in patients with schizophrenia: A 99mTc-HMPAO SPET study.

Crawford, T. J., Puri, B. K., Nijran, K. S., Jones, B., Kennard, C. & Lewis, S. W. 1996 In : Psychological Medicine. 26, p. 265-277 13 p.

Research output: Contribution to journalJournal article

1995

An effect of structured backgrounds on smooth pursuit eye movements in patients with cerebral lesions

Lawden, M., Bagelmann, H., Crawford, T., Matthews, T. D. & Kennard, C. 1995 In : Brain. 118, 1, p. 37-48 12 p.

Research output: Contribution to journalJournal article

Saccadic abnormalities in psychotic patients I: neuroleptic-free psychotic patients

Crawford, T., Haeger, B., Kennard, C., Reveley, M. A. & Henderson, L. 1995 In : Psychological Medicine. 25, 3, p. 461-471 11 p.

Research output: Contribution to journalJournal article

Saccadic abnormalities in psychotic patients II: the role of neuroleptic treatment

Crawford, T., Haeger, B., Kennard, C., Reveley, M. A. & Henderson, L. 1995 In : Psychological Medicine. 25, 3, p. 473-483 11 p.

Research output: Contribution to journalJournal article

1994

A pathophysiological approach to saccadic eye movements in neurological and psychiatric disease

Kennard, C., Crawford, T. & Henderson, L. 1994 In : Journal of Neurology, Neurosurgery and Psychiatry. 57, 8, p. 881-885 5 p.

Research output: Contribution to journalJournal article

1992

Spatial and Temporal Effects of Spatial Attention on Human Saccadic Eye Movements.

Crawford, T. J. & Muller, H. 02/1992 In : Vision Research. 32, 2, p. 293-304 12 p.

Research output: Contribution to journalJournal article

Saccadic Eye Movements in Parkinson's Disease: I. Delayed Saccades

Lueck, C. J., Tanyeri, S., Kennard, C., Crawford, T. & Henderson, L. 1992 In : Quarterly Journal of Experimental Psychology Series a Human Experimental Psychology. 45, 2, p. 193-210 18 p.

Research output: Contribution to journalJournal article

Saccadic Eye Movements in Parkinson's Disease: II. Remembered Saccades— Towards a Unified Hypothesis?

Lueck, C. J., Crawford, T., Henderson, L., Van Gisbergen, J. A. M., Duysens, J. & Kennard, C. 1992 In : Quarterly Journal of Experimental Psychology Series a Human Experimental Psychology. 45, 2, p. 211-233 23 p.

Research output: Contribution to journalJournal article

1991

Multi-stepping saccadic sequences in humans.

Crawford, T. J. 02/1991 In : Acta Psychologica. 76, 1, p. 11-29 19 p.

Research output: Contribution to journalJournal article

A case of ocular tilt reaction and torsional nystagmus due to direct stimulation of the midbrain in man

Lueck, C. J., Hamlyn, P., Crawford, T., Levy, I. S., Brindley, G. S., Watkins, E. S. & Kennard, C. 1991 In : Brain. 114, 5, p. 2069-2079 11 p.

Research output: Contribution to journalJournal article

Increase in saccadic peak velocity with increased frequency of saccades in man.

Lueck, C. J., Crawford, T. J., Hansen, H. C. & Kennard, C. 1991 In : Vision Research. 31, 7-8, p. 1439-1443 5 p.

Research output: Contribution to journalJournal article

Scales for rating motor impairment in Parkinson's disease: studies of reliability and convergent validity

Henderson, L., Kennard, C., Crawford, T., Day, S., Everitt, B. S., Goodrich, S., Jones, F. & Park, D. M. 1991 In : Journal of Neurology, Neurosurgery and Psychiatry. 54, 1, p. 18-24 7 p.

Research output: Contribution to journalJournal article

1990

Antisaccades and remembered saccades in Parkinson's disease.

Lueck, C. J., Tanyeri, S., Crawford, T., Henderson, L. & Kennard, C. 04/1990 In : Journal of Neurology, Neurosurgery and Psychiatry. 53, 4, p. 284-288 5 p.

Research output: Contribution to journalJournal article

Auditory-visual interaction in the generation of saccades in man

Lueck, C. J., Crawford, T., Savage, C. J. & Kennard, C. 1990 In : Experimental Brain Research. 82, 1, p. 149-157 9 p.

Research output: Contribution to journalJournal article

Saccadic eye movements in essential blepharospasm

Lueck, C. J., Tanyeri, S., Crawford, T., Elston, J. S. & Kennard, C. 1990 In : Journal of Neurology . 237, 4, p. 226-229 4 p.

Research output: Contribution to journalJournal article

1989

Abnormalities of nonvisually-guided eye movements in Parkinson's Disease

Crawford, T., Henderson, L. & Kennard, C. 1989 In : Brain. 112, 6, p. 1573-1586 14 p.

Research output: Contribution to journalJournal article

Predictive responses in Parkinson's disease: manual keypresses and saccadic eye movements to regular stimulus events

Crawford, T., Goodrich, S., Henderson, L. & Kennard, C. 1989 In : Journal of Neurology, Neurosurgery and Psychiatry. 52, 9, p. 1033-1042 10 p.

Research output: Contribution to journalJournal article

Unilateral reversal of smooth pursuit and optokinetic nystagmus

Lueck, C. J., Tanyeri, S., Mossman, S., Crawford, T. J. & Kennard, C. 1989 In : Revue neurologique. 145, 8-9, p. 656-660 5 p.

Research output: Contribution to journalJournal article

1988

Two distinct deficits of visual tracking caused by unilateral lesions of cerebral cortex in humans

Thurston, S. E., Leigh, R. J., Crawford, T., Thompson, A. & Kennard, C. 1988 In : Annals of Neurology. 23, 3, p. 266–273 8 p.

Research output: Contribution to journalJournal article

Trevor Crawford's Projects

2013

2012

Parkinson’s can impact enormously on speech communication. In healthy people, co-speech gestures can add meaning and emphasis to speech. There is some evidence that gestures are reduced by Parkinson’s, alongside other motor problems. Conversely, gestures might provide a means to compensate for poor speech in Parkinson’s. To date, there has been very little research on the effect of Parkinson’s on gestural communication.

This PhD studentship will address three important questions. First, how does Parkinson’s affect the spontaneous production of different types of co-speech gesture? We will compare video footage of people with Parkinson’s and age-matched controls carrying out a description task. Gesture rate and

type will be compared between groups. In addition, we will examine whether changes in gesture are associated with particular characteristics in the Parkinson’s group. Second, are Parkinsonian cospeech

gestures less well understood by other people? We will measure how gestures in clips obtained from the first study influences comprehension in young healthy participants, comparing their responses to the Parkinson’s and control videos. Finally, we will investigate whether Parkinson’s affects peoples’ ability to comprehend co-speech gestures, by comparing a Parkinson’s and control

group on comprehension of the video clips obtained from the healthy participants in the second study.

Overall, this project will contribute to the understanding of gestural communication in Parkinson’s, increasing understanding of an important symptom and paving the way for potential interventions involving gesture. Our findings may also suggest how others can improve their communication with people with Parkinson’s.

2009

Novel biomarkers and alzheimer's disease

Crawford, T. & Allsop, D.

1/10/0930/09/13

PS7, The Fisher Foundation

Trevor Crawford's Activities

2013

Eyecare 3000

Dr Trevor Crawford (Keynote/plenary speaker), 21/01/2013

Activity: Conference participationParticipation in conference

2012

Speaking with your hands in Parkinson’s: the role of cospeech gestures in communication

Dr Trevor Crawford (Supervisor), 1/09/201230/08/2015

Activity: External academic engagementResearch and Teaching at External Organisation

2010

Experimental Brain Research

Dr Trevor Crawford (Peer reviewer), 5/01/2010

Activity: Editorial work or peer review of publicationsPublication peer-review

2009

Neuropsychologia

Dr Trevor Crawford (Peer reviewer), 16/06/20091/05/2012

Activity: Editorial work or peer review of publicationsPublication peer-review

2008

Journal of Experimental Psychology: Human Perception and Performance

Dr Trevor Crawford (Peer reviewer), 7/05/2008

Activity: Editorial work or peer review of publicationsPublication peer-review

Brain Research

Dr Trevor Crawford (Peer reviewer), 22/03/2008

Activity: Editorial work or peer review of publicationsPublication peer-review

2001

British Association of Neuropsychology

Dr Trevor Crawford (Member), 2001

Activity: External academic engagementMembership of external research organisation

Current Students

Research students currently supervised by Trevor Crawford include: