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In recent attempts to formulate an integrative model of mental slowing in elderly persons, regression analyses have been done in which reaction-time data from a large number of studies spanning a broad range of speeded decision-making tasks were combined. The results of these meta-analyses were then used to support the conclusion that there is a(More)
We report an experiment designed to assess the interactions between the CNV and the P300 components of human event-related potential. Eight subjects were each presented with series of experimental trials on all of which either a 1200 c/sec or an 800 c/sec tone was presented. There were three independent variables: (a) The presence or absence of a warning(More)
The relationship of P300 to the CNV was investigated by Donchin, Tueting, Ritter, Kutas and Heffley (1975) who concluded that these two components of the event-related brain potential (ERP) are independent. Wastell (1979) questioned the validity of the data analysis procedures and of the experimental design used by Donchin et al. In this report we examine(More)
The PEARL II portable laboratory computer integrates hardware and software to serve as an on-line, realtime, experimental control and data acquisition system. Although the system can be used in many areas of research, PEARL II development has emphasized investigation of physiological responses from human subjects performing complex experimental tasks. PEARL(More)
The form of the average cortical potential is determined both by the physical characteristics of the eliciting stimulus and by the nature of the information processing activities invoked by that stimulus. In particular, much evidence has shown that P300, a component with a positive polarity, and a modal latency of about 300 msec, is considerably enhanced in(More)
Levy and Reid's [1] hypothesis that persons who write using the inverted posture have ipsilateral control of distal limb movements, particularly those involved in handwriting, was tested in three experiments in which asymmetries in the readiness potential (RP) were measured. In the first experiment, each subject executed a self-paced repetitive squeeze.(More)
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