The MITAX, MYOACT and MDI tools, which are now undergoing validity testing, should enhance the consistency, comprehensiveness and reliability of disease activity and damage assessment in patients with myositis.
Behavior analysis is an example of a selection science, and behavioral programs that follow the tenets of selectionism, long advocated by B. F. Skinner, can have a large impact on social problems. This article describes the characteristics of selection sciences and their application in the Morningside Model of Generative Instruction, which addresses both adult literacy and children's learning and attention problems. School curricula are analyzed for their key component elements and underlying tool skills. Teaching procedures then establish and build these key components to fluency. New and complex repertoires then emerge with little or no instruction, producing curriculum leaps that allow students to make rapid academic advancement. Children typically gain more than two grade levels per school year, and adults advance two grades per month.
Fluency is a metaphor for flowing, effortless, well-practiced, and accurate performance. Current practice in fluency building involves increasing the frequency of free-operant performances. Free-operant performance is defined as continuous responding in the presence of discriminative stimuli that are either varied or not varied from response to response. Free-operant performance is also distinguished from discrete-trial performance. Frequency-building procedures are also described, including defining the learning channel and stimulus control topography of a component performance (called a pinpoint), selecting an appropriate timing period, and displaying stimuli so that no performance ceilings occur. During frequency building, frequencies of pinpoints are continuously charted on standard celeration charts. Frequencies are increased to empirically derived performance standards, or aims, that predict retention, endurance, stability, application, and adduction of performance. Frequency is also described as a dimension of performance, not simply its measurement. Frequency building is described as possibly facilitating contingency adduction.
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