Penelope J Klein

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This research documents the development of long-term memory in human infants from 2 months through the end of the first year-and-a-half of life. In the initial study phase, we trained 6- to 18-month-old human infants in an operant task and tested them after increasing delays until they exhibited no retention for 2 successive weeks. In the second phase,(More)
In two experiments with 260 infants between 2 and 12 months of age, we examined how differences between the conditions of encoding and retrieval affect retention. Initially, 9- and 12-month-olds were tested with a different cue (Experiment 1) or in a different context (Experiment 2) after delays spanning their respective forgetting functions. These data(More)
Computer-assisted video motion analysis is a method of evaluating human kinematics that offers promise both for research and for clinical application. This study determined the upper limits of accuracy and consistency of linear and angular measures obtained using the Ariel Performance Analysis System. Reference standards included a meter stick and a(More)
BACKGROUND AND PURPOSE Exercise is advocated in the management of Parkinson disease (PD), however, little is known regarding the potential benefits of complementary mind/body exercise for this clinical population. The purpose of this pilot program evaluation was to gain insight into participant and instructor perceptions of the perceived benefits and(More)
Although both the onset of schizophrenia and human phencyclidine (PCP) abuse typically present within the interval from adolescence to early adulthood, the majority of preclinical research employing the PCP model of schizophrenia has been conducted on neonatal or adult animals. The present study was designed to evaluate the behavioral and neurochemical(More)
PURPOSE This cross-sectional study explores the psychometric properties and dimensionality of the Fullerton Advanced Balance (FAB) Scale, a multi-item balance test for higher-functioning older adults. METHODS Participants (n=480) were community-dwelling adults able to ambulate independently. Data gathering consisted of survey and balance performance(More)
The surface of the cells of the normal choroid plexus and of the plexus papillomas is coated by sialomucopolysaccharides, containing substances which are positively stained with the colloidal iron (Hale-) reaction. After pretreatment with neuraminidase sialic acid is removed rendering the membrane negative to the Hale reaction. Using FITC- or(More)
The granular cell tumourettes of the posterior lobe of the pituitary possess neuraminic acid containing carbohydrate. After removal of neuraminic acid with neuraminidase and exposure to FITC (Fluorescein isothiocyanate) labelled peanut agglutinin (Arachis hypogaea) (PNA), intracellular receptor structures could be demonstrated. The significance of the(More)
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