The mental prosthesis: assessing the speed of a P300-based brain-computer interface

E Donchin, KM Spencer… - IEEE transactions on …, 2000 - ieeexplore.ieee.org
Describes a study designed to assess a brain-computer interface (BCI), originally described
by Farwell and Donchin in 1988. The system utilizes the fact that the rare events in the …

Abnormal neural synchrony in schizophrenia

KM Spencer, PG Nestor, MA Niznikiewicz… - Journal of …, 2003 - Soc Neuroscience
Schizophrenia has been conceptualized as a failure of cognitive integration, and abnormalities
in neural circuitry (particularly inhibitory interneurons) have been proposed as a basis for …

Neural synchrony indexes disordered perception and cognition in schizophrenia

KM Spencer, PG Nestor, R Perlmutter… - Proceedings of the …, 2004 - National Acad Sciences
Current views of schizophrenia suggest that it results from abnormalities in neural circuitry,
but empirical evidence in the millisecond range of neural activity has been difficult to obtain. …

Surface-enhanced Raman detection of 2, 4-dinitrotoluene impurity vapor as a marker to locate landmines

JM Sylvia, JA Janni, JD Klein, KM Spencer - Analytical chemistry, 2000 - ACS Publications
Time, cost, and casualties associated with demining efforts underscore the need for improved
detection techniques. Reduction in the number of false positives by directly detecting the …

First trimester maternal serum free β human chorionic gonadotrophin and pregnancy associated plasma protein A as predictors of pregnancy complications

CYT Ong, AW Liao, K Spencer, S Munim… - … Journal of Obstetrics …, 2000 - Wiley Online Library
Objective To examine the value of first trimester maternal serum free β human chorionic
gonadotrophin (β hCG) and pregnancy associated plasma protein A (PAPP‐A) as predictors of …

Spatiotemporal analysis of the late ERP responses to deviant stimuli

KM Spencer, J Dien, E Donchin - Psychophysiology, 2001 - cambridge.org
We used a novel application of principal components analysis (spatiotemporal PCA) to
decompose the event-related brain potentials (ERPs) obtained with a dense electrode array, with …

Screening for chromosomal abnormalities in the first trimester using ultrasound and maternal serum biochemistry in a one-stop clinic: a review of three years …

K Spencer, CE Spencer, M Power, C Dawson… - BJOG: an international …, 2003 - Elsevier
OBJECTIVE: To evaluate the performance of a one-stop multidisciplinary clinic of screening
for fetal chromosomal anomalies in the first trimester of pregnancy by a combination of …

Analytical reviews in clinical biochemistry: the estimation of creatinine

K Spencer - Annals of clinical biochemistry, 1986 - journals.sagepub.com
Liebig in 184i first gave the name creatinine to a substance he obtained by heating creatine
with mineral acids. It was not until the synthesis of creatinine by Horbaczewski in 18852 and …

Neurophysiological biomarkers for drug development in schizophrenia

DC Javitt, KM Spencer, GK Thaker, G Winterer… - Nature Reviews Drug …, 2008 - nature.com
Schizophrenia represents a pervasive deficit in brain function, leading to hallucinations and
delusions, social withdrawal and a decline in cognitive performance. As the underlying …

Parsing the late positive complex: mental chronometry and the ERP components that inhabit the neighborhood of the P300

J Dien, KM Spencer, E Donchin - Psychophysiology, 2004 - Wiley Online Library
Falkenstein, Hohnsbein, and Hoorman (1994) suggested that common measures of P300
latency confound a “P‐SR” component whose latency corresponds to stimulus evaluation time …