This document discusses the concept of strokes in transactional analysis. It defines a stroke as a unit of attention or recognition that provides stimulation to an individual. Strokes can be verbal or non-verbal, internal or external, positive or negative, and conditional or unconditional. The document notes that while any kind of stroke is better than no stroke, the quality and intensity of strokes are important. It also discusses concepts like stroke profiles, stroke economies, and discounts.