Adult age differences in Wisconsin Card Sorting Test (WCST) measures were examined before and after statistical control of age-related differences in measures of feedback usage, working memory, and perceptual-comparison speed. The proportion of age-related variance associated with a summary measure of WCST performance was greatly reduced after controlling for measures of feedback usage, working...

Entrepreneurship has long been perceived as a crucial determinant for economic growth. There has been a considerable upsurge in researches trying to determine the main elements driving entrepreneurship and the channel through which entrepreneurship generates economic growth; however, a global consensus has not been reached yet on theoretical, methodological and empirical levels.  The basic prob...

controlling is a very important function of every manager. controlling is based and closely related to planning or the first function of management. these two functions are so related to each other that may be viewed as the blades of a pair of scissors. the scissors can not work unless there are two blades. without plans, control is not possible. theoretically, the concept of concept of control...