Graduate Studies Faculty
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Assistant Professor, Department of Psychiatry
Assistant Professor, Department of Behavioral Neuroscience
Reserch Areas:
Auditory perception attention and memory, functional magnetic resonance imaging of perceptual reorganization due to blindness. Attention deficit disorders
Education:
B.A. (1986) University of Rochester
M.A. (1991) Experimental Psychology, University of New Hampshire
Ph.D. (1995) Experimental Psychology, University of New Hampshire
Postdoctoral Associate, Department of Diagnostic Radiology,
Yale University School of Medicine
NIMH Postdoctoral Fellow, Child Study Center, Yale University School of Medicine.
Research Interests
Our work focuses on auditory perception attention and memory and its underlying neural organization. We are currently working in two areas related to attention and memory: First, through a collaboration with Ed Awh at the University of Oregon, we are attempting to identify specific cognitive mechanisms that are disrupted in ADHD. This line of inquiry involves determining the relationship between perceptual abnormalities, attention and working memory in healthy individuals as well as in individuals diagnosed with attention deficit disorders.
Second, We are interested in how experience affects auditory perceptual abilities. Our recent studies have examined the influence of blindness on the functional properties of auditory and visual cortices, and specific auditory perceptual abilities. We employ behavioral testing and psychoacoustic techniques to examine the mechanisms of perception, along with functional magnetic resonance imaging (fMRI) to elucidate their neural correlates. We are now beginning studies on a 7 Tesla human MR system to be able to study trial-by-trial effects of learning and attention.
Selected Recent Publications
Stevens, AA., Weaver, K (2005). Auditory perceptual consolidation in the blind. Neuropsychologia. 43(13),1901-1910.
Weaver, K., Stevens, AA. (2007) Attention and sensory interaction in Occipital Cortex in the Early Blind. Journal of Cognitive Neuroscience, 19(2), 1-16.
Garg, A. Schwartz, D, Stevens, AA. (2007) Frontal eye field activity during auditory spatial attention in early blind. Neuropsychologia, Neuropsychologia, 45, 2307-2321.
Stevens AA, Snodgrass, M, Weaver, KW, Schwartz, D. (2007). Enhancement of auditory temporal processing in congenital blindness related to brain preparatory activity. Journal of Neuroscience, 27,10734-41.
Alexander Stevens
Admin Unit: SOM-Psychiatry Department
Email: stevenal@ohsu.edu
Programs:
Behavioral NeurocienceResearch Interests:
Auditory Perception Functional Plasticity Blindness Attention Working MemoryPreceptor Rotations
Dr. Stevens has not indicated availability for preceptor rotations at this time.Faculty Mentorship
Dr. Stevens is available as a mentor for 2008-2009.Profile
Alexander A. StevensAssistant Professor, Department of Psychiatry
Assistant Professor, Department of Behavioral Neuroscience
Reserch Areas:
Auditory perception attention and memory, functional magnetic resonance imaging of perceptual reorganization due to blindness. Attention deficit disorders
Education:
B.A. (1986) University of Rochester
M.A. (1991) Experimental Psychology, University of New Hampshire
Ph.D. (1995) Experimental Psychology, University of New Hampshire
Postdoctoral Associate, Department of Diagnostic Radiology,
Yale University School of Medicine
NIMH Postdoctoral Fellow, Child Study Center, Yale University School of Medicine.
Research Interests
Our work focuses on auditory perception attention and memory and its underlying neural organization. We are currently working in two areas related to attention and memory: First, through a collaboration with Ed Awh at the University of Oregon, we are attempting to identify specific cognitive mechanisms that are disrupted in ADHD. This line of inquiry involves determining the relationship between perceptual abnormalities, attention and working memory in healthy individuals as well as in individuals diagnosed with attention deficit disorders.
Second, We are interested in how experience affects auditory perceptual abilities. Our recent studies have examined the influence of blindness on the functional properties of auditory and visual cortices, and specific auditory perceptual abilities. We employ behavioral testing and psychoacoustic techniques to examine the mechanisms of perception, along with functional magnetic resonance imaging (fMRI) to elucidate their neural correlates. We are now beginning studies on a 7 Tesla human MR system to be able to study trial-by-trial effects of learning and attention.
Selected Recent Publications
Stevens, AA., Weaver, K (2005). Auditory perceptual consolidation in the blind. Neuropsychologia. 43(13),1901-1910.
Weaver, K., Stevens, AA. (2007) Attention and sensory interaction in Occipital Cortex in the Early Blind. Journal of Cognitive Neuroscience, 19(2), 1-16.
Garg, A. Schwartz, D, Stevens, AA. (2007) Frontal eye field activity during auditory spatial attention in early blind. Neuropsychologia, Neuropsychologia, 45, 2307-2321.
Stevens AA, Snodgrass, M, Weaver, KW, Schwartz, D. (2007). Enhancement of auditory temporal processing in congenital blindness related to brain preparatory activity. Journal of Neuroscience, 27,10734-41.
