Task switching research has revealed that task changes lead to a performance switch cost. The present study focuses on the organization of task components in the task set. Three different views of task set organization have been distinguished and evidence in favor of each of these has been reported in the literature. In four experiments, we orthogonally varied the categorization task (magnitude...

What we did recently influences our current behavior substantially. For example, responses are speeded if observers are to discriminate an item based on its color twice (e.g., color – color discrimination in trials n-1 and n, respectively) compared to when the taskrelevant dimension changes across trials (e.g., orientation – color discrimination). The dimension repetition effect (or DRE) was ex...

The ltering problem for discrete Volterra equations is a nontrivial task due to an increasing dimension of the equivalent single step process model A di erence equation of a moderate dimension is chosen as an approximate model for the original system Then the reduced Kalman lter can be used as an approximate but e cient estimator Using the duality theory of convex variational problems a level o...

The task of object recognition in image processing and machine vision problems relies on nding good algorithms for one particular low-level processing task: image segmentation. In this report, we apply the concept of fractal dimension to this problem. In particular, we introduce the notion of a local fractal operator that can \measure" the fractal dimension of a single pixel; we investigate thr...