This dissertation examined the contribution of age-related changes in sympathetic-adrenal medullary (SAM) functioning to age-related deficits in cognitive processes. Two experiments involved parametric studies within a stimulus class to characterize more fully age-related differences in plasma catecholamine (CA) responses to acute stress. Results from the footshock experiment revealed that aged male F-344 rats have potentiated plasma CA responses to handling and transfer during placement in an inhibitory (passive) avoidance testing ...
This study investigated how information is processed from graphic vs. alphanumeric multi-element visual displays using principles derived from the Theory of Signal Detection (TSD). A diagnostic decision task was used in an evaluation of four different display formats: (1) A numerical display composed of n two-digit numbers arranged in a linear horizontal format; (2) a similar numerical display in which the display elements were arranged in a square matrix array; ...
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