Publications
Papers
Presented
Rotkin, L.G., Greenwood, P.M., Gazzaniga,
M.S. (1977) Psychophysics with "split-brain" patient. Perceptual asymmetries and verbal mediation
in sensory judgments. Eastern Psychological
Association.
Fischer, M.A. & Greenwood, P.M. (1978)
Visual field effects in the mental rotation of two-dimensional figures.
Annual Meeting of the International Neuropsychological Society.
Greenwood, P.M. & Goff, W.R. (1981)
Interictal recovery functions of the somatosensory evoked potential in epileptics.
Electroencephalography and Clinical Neurophysiology, 51, 22p.
Greenwood, P.M. & Tweedy, J.R. (1983)
Effects of diffuse brain injury on network representations of semantic similarity.
International Neuropsychological Society.
Reding, M., Luby, R., Wagner, M. and Greenwood,
P. (1984) The P300 response to a written oddball stimulus-recognition
task allows for sensitive, objective serial measurements of language dysfunction.
American Foundation for Clinical Research.
Greenwood, P.M., Parasuraman, R., &
Haxby, J. (1989, October) Covert attentional shifts and cerebral metabolism
in Alzheimer's disease and normal aging.
Society for Neuroscience,
Phoenix, Az.
Greenwood, P.M., Parasuraman, R. & Haxby,
J. (1991, February) Shifts of visual attention in mild and moderate Alzheimer's
disease. Presented at the International Neuropsychological Society.
Greenwood, P.M., Parasuraman, R. and May,
P. (1992, April). Visuospatial attention
is altered in 75-85 year olds. Cognitive
Aging Society Conference, Atlanta, Georgia.
Greenwood, P.M., Parasuraman, R., Panicker,
S. & Haxby, J.V. (1992, October).
Effects of size of attentional focus on visual search in aged adults.
Society for Neuroscience Annual Meeting, Anaheim, CA.
Berardi, A., Gaillard, F., Haxby, J.V.,
Greenwood, P.M. and Parasuraman, R. (1992, November). Age-related differences in sustained attention for a high event-rate
visual digit discrimination task. American
Geriatrics Society Annual Conference, Washington, D.C..
Panicker, S., Greenwood, P.M., Parasuraman,
R. and Haxby, J.V. (1993, November). Cued visual search in Alzheimer's disease. Presented at the Society for Neuroscience Annual
Meeting, Washington, D.C.
Panicker, S., Greenwood, P.M. and Parasuraman,
R. (1994, November). Effects of
age on the distribution of visuospatial attention. Presented at the Society
for Neuroscience Annual Meeting, Miami, FL.
Hardy, D.L., Greenwood, P.M., Parasuraman,
R. (1995, June) Effect of distractors on visuospatial attention processes
in normal elderly. Presented at the Annual Meeting of the American Psychological
Society, NYC.
Greenwood, P.M., Parasuraman, R. & Alexander,
G.E. (1995, November) Effects of normal aging on the spatial distribution
of visuospatial attention in visual search. Presented at the Society for
Neuroscience Annual Meeting, San Diego, CA.
Johnson, S.R., Greenwood, P.M., Hicks, L.
& Parasuraman, R. (1996, April)
Age effects on intermodal spatial attention.
Presented at the Cognitive Aging Conference, Atlanta, Georgia.
Greenwood, P.M. & Parasuraman, R. (1996,
April). Control of the focus of visuospatial attention in healthy aging.
Presented at the Cognitive Aging Conference, Atlanta, Georgia.
Greenwood, P.M. & Parasuraman, R.
(1996, November). Healthy aging slows dynamic adjustment of the scale
of the attentional focus. Presented at the Society for Neuroscience Annual
Meeting, Washington, DC.
Jiang, Y., Greenwood, P., Parasuraman, R.
(1997, April) Temporal dynamics of 3-D motion priming in young and
older adults. Presented at the Cognitive
Neuroscience Society, San Francisco.
Greenwood, P.M., Parasuraman, R. & Alexander,
G.E. (1997). Changes in the ability to dynamically adjust the attentional
focus from youth to old age to Alzheimer Disease. Presented at the Society for Neuroscience Annual Meeting, New Orleans, LA.
Levy, J. , Parasuraman, R., Greenwood, P.,
Dukoff, R., Lasser, R. & Sunderland, T. (1998, February). Acetylcholine affects the spatial distribution
of attention: Evidence from Alzheimer's
Disease. Presented at the International Neuropsychological Society,
Greenwood, P.M., Parasuraman, R. (1998)
Aging delays the development but increases the magnitude of effects of precue
precision in visual search. Presented
at the Cognitive Aging Conference, Atlanta, Georgia.
Alexander, G.E., Greenwood, P.M., Szczepanik,
J., Levine, B. Pietrini, P., et al. (1998) Functional brain response in
right prefrontal cortex with increasing distraction during visual selective
attention. Paper presented at the
International Conference on Functional Mapping of the Human Brain, June,
Montreal.
Greenwood, P.M. Alexander, G.E., Parasuraman,
R. (1998) Visual search in healthy aging and Alzheimer Disease.
Paper presented at the Society for Neuroscience, November, Los Angeles.
Chavez, C.M., Greenwood, P.M. & Parasuraman,
R. (1998) Benefits of location cue validity for luminance detection increase
over the adult lifespan. Paper presented at the Society for Neuroscience,
November, Los Angeles.
Greenwood,
P.M., Parasuraman, R. & Sunderland, T. The ability to shift and to scale
visuospatial attention is impaired in aging, but only in the presence of
the apoE e4 allele. Paper presented
at the Cognitive Neuroscience Society, April, 1999.
Luo, Y., Greenwood, P.M., & Parasuraman,
R. Electrophsiological correlates of the scaling of the focus of visuospatial
attention. Paper presented at the Society for Neuroscience, November, 1999.
Greenwood, P.M., Alexander, G.E., &
Parasuraman, R. Progression in early Alzheimer disease increases costs but
not benefits of cue validity in visuospatial attention. Paper presented
at the Society for Neuroscience, November, 1999.
Chavez, C., Greenwood, P.M., & Parasuraman,
R. Visual search accuracy benefits from a larger
attentional focus in young and old. Paper presented at the Society
for Neuroscience, November, 2000.
Greenwood, P.M., Caggiano, D., & Parasuraman,
R. The fastest search is not accompanied by the fewest fixations of the
eyes in young or old. Paper presented at Cognitive Neuroscience Society,
March, 2001.
Greenwood, P.M., R., Friz, J. Lambert, C.
& Sunderland, R Parasuraman. Focussing attention at the boundary of
healthy and pathologic aging. Paper presented at the Cognitive Neuroscience
Society, San Francisco, CA, April 2002.
Chapters
Greenwood, P.M. & Gazzaniga, M.S. (1985).
Human brain injury and recovery: Psychometric clues to mechanism. In A. Bignami, F.E. Bloom, C.L.Bolis &
A.Adeloye (Eds.) Central Nervous Plasticity and Repair. Raven
Press, New York.
Parasuraman, R. & Greenwood, P.M. (1996).
Functional brain imaging and selective attention in early Alzheimer's disease.
In B. Vellas, L.J. Fitten, B. Dubois, J.L Alborede (Eds.) Facts
and Research in Gerontology. Springer, NewYork
Greenwood, P.M. & Parasuraman, R.
(1997). Attention in aging and Alzheimer’s Disease:
Behavior and neural systems. In J. Burack and J. Enns, Attention,
development and Psychophysiology, Guilford Press, NY.
Parasuraman, R. & Greenwood, P.M. (1997).
Attention and brain function in aging and Alzheimer’s disease. In I.L Singh & R. Parasuraman (Eds.) Recent Advances in Cognition:
A Multidisciplinary Perspective. New Delhi: Sage.
Parasuraman, R. & Greenwood, P.M. (1998).
Selective attention in aging and dementia. In R. Parasuraman (Ed.) The Attentive Brain. MIT Press, Cambridge.
Papers
Greenwood, P.M. & Singer, J.J. (1974)
Cortical spreading depression induced state dependency. Behavioral Biology, 10, 345-351.
Greenwood, P.M., Wilson, D.H.,& Gazzaniga,
M.S. (1977) Dream report following commissurotomy. Cortex, 13, 311-316.
Greenwood, P.M., Rotkin, L.G., Wilson,D.H.
& Gazzaniga, M.S. (1980) Psychophysics with the split-brain subject:
On hemispheric differences and numerical mediation in perceptual matching
tasks. Neuropsychologia, 18, 419-434.
Greenwood, P.M. & Goff, W.R. (1987)
Modification of median nerve somatic evoked potentials by prior median nerve,
peroneal nerve and auditory stimulation. Electroencephalography and Clinical
Neurophysiology, 68, 295-302.
Parasuraman, R., Nestor, P. and Greenwood,
P.M. (1989) Sustained-attention
capacity in young and old adults. Psychology and Aging, 4,
339-345.
Greenwood, P. & Parasuraman, R. (1991)
Effects of aging on the speed of attentional cost of cognitive operations.
Developmental Neuropsychology, 7, 421-434.
Parasuraman, R., Greenwood, P.M., Haxby,
J.V. & Grady, C.L. (1992) Visuospatial
attention in dementia of the Alzheimer type. Brain, 115, 711-733.
Greenwood, P.M., Parasuraman, R., &
Haxby, J.V. (1993) Directed visual attention over the adult life span. Neuropsychologia,
31, 471-485.
Greenwood, P.M. & Parasuraman, R. (1994) Attentional disengagement deficit in nondemented elderly
over 75 years of age. Aging and
Cognition, 1, 188-202.
Parasuraman, R., Greenwood, P.M. & Alexander,
G.E. (1995) Selective impairment
of spatial attention during visual search in Alzheimer’s Disease. Neuroreport,
6, 1861-1864.
Greenwood, P.M., Parasuraman, R. & Alexander,
G.E. (1997) Controlling the focus of spatial attention during visual search:
Effects of advanced aging and Alzheimer Disease. Neuropsychology,
11, 3-12.
Greenwood, P.M. & Parasuraman, R.
(1999) Scale of attentional focus in visual search:
Effects of adult aging. Perception and Psychophysics. 61,
837-859.
Jiang, Y., Greenwood, P.M. & Parasuraman,
R. (1999) Age-related reduction in 3-D visual motion priming. Psychology
and Aging, 14, 619-626.
Levy, J.A., Parasuraman, R., Greenwood, P.M.,
Dukoff, R. Sunderland, T. (2000) Acetylcholine affects the spatial scale of
attention: Evidence from Alzheimer’s Disease. Neuropsychology, 14,
288-298.
Parasuraman, R., Greenwood, P.M. & Alexander,
G.E. (2000) Alzheimer disease constricts the dynamic range of spatial attention
in visual search. Neuropsychologia, 38, 1026-1135
Greenwood, P.M.
(2000) The frontal aging hypothesis evaluated. Journal of the
International Neuropsychological Society, 6, 730.
Greenwood, P.M.
(2000) Reply to West. Journal of the International Neuropsychological
Society, 6, 730.
Greenwood, P.M., Sunderland,
T. Friz, J., Parasuraman, R. (2000) Genetics and visual attention: Selective
deficits in healthy adult carriers of the e4 allele of the apolipoprotein
E gene. Proceedings of the National Academy of Sciences, 97,
11661-11666.
Luo, Y.-J., Greenwood, P.M., Parasuraman, R. (2001)
Dynamics of the spatial scale of visual attention revealed by brain
event-related potentials. Cognitive Brain Research, 12, 371-381.
Parasuraman,
R. & Greenwood, P. & Sunderland, T. (2002) The apolipoprotein E
gene, attention, and brain function. Neuropsychology, 16, 254-274
Parasuraman,
R. & Greenwood, P. & Alexander, G.E. (submitted) Attention shifting deficit in a visual discrimination
task increases with progression of early Alzheimer’s Disease.
Greenwood,
P.M. & Parasuraman, R. (submitted) Top-down information guiding visual
search: Elderly are slower to employ it but more dependent upon it.