of conceptual tools that are directly useful in guiding the implementation and evaluation of work redesign projects. In the paragraphs to follow, we examine several existing theoretical approaches to work redesign, with a special eye toward the measurability of the concepts employed and the action implications

; Wiesel 1968, DeValois et al. 1982a, DeAngelis et al. 1993): they are localised in space and time, have band-pass characteristics in the spatial and temporal frequency domains, are oriented, and are often sensitive to the direction of motion of a stimulus. Here we will concentrate on the spatial

complex stimuli, such as models of flowers, snakes, hands, and faces. If a neuron responded to any of these stimuli, we attempted to isolate the critical stimulus features underlying the response. We found that many of the responsive neurons responded well to virtually every stimulus tested. The remaining

Several formal models of excitatory classical conditioning are reviewed. It is suggested that a central problem for all of them is the explanation of cases in which learning does not occur in spite of the fact that the conditioned stimulus is a signal for the reinforcer. We propose a new model

." Journal of Economic Perspectives defined the happiness of an individual during a period of time as the sum of the momentary utilities over that time period; that is, the temporal integral of momentary utility. Several methods have been used to attempt to measure the moment-tomoment flow of pleasure

The hypothesis that abrupt visual onsets capture attention automatically, as suggested by Yantis and Jonides (1984) was tested in four experiments. A centrally located cue directed attention to one of several stimulus positions in preparation for the identification of a target letter embedded

) in his use of the stimulus trace to explain serial phenomena. Again, Underwood (1949) has suggested that forgetting occurs during the acquisition process. But these theoretical considerations have not led to empirical investigation. Hull (1952) quantified the stimulus trace on data concerned with the CS

. During particularly severe contractions, open-market operations alone may be insufficient to restore equilibrium; some other stimulus is needed. Abstracting from such rare events, if policy follows the Taylor rule and targets a zero inflation rate, there is a signi cant increase in the variability

ABSTRACT The space around us is represented not once but many times in parietal cortex. These multiple representations encode locations and objects of interest in several egocentric reference frames. Stimulus representations are transformed from the coordinates of receptor surfaces

, and almost half were sensitive to the direction of movement. Several classes of directional neurons were found, including a) neurons selective for a single direction of movement throughout their receptive field, b) neurons selective for directions of move-ment radially symmetric about the center of gaze