A laboratory model designed to study tasks, activities, and occupation components is described. The feasibility of the model for gathering evidence about inherent factors perceived by participants in five discrete situations that involved spinning, drawing, manual rolling, buttoning, and chewing was tested. Results provide limited but specific evidence to support the concept that tasks, activities, and occupation components possess inherent factors that may be used in assessment and intervention to affect the interrelationships among external actions, external objects, and internal mental operations. Such evidence strengthens the credibility of emerging occupational theory for the practice of occupational therapy.

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