Final answer:
Manual cues are most effective during the initial stages of learning, especially when the task is new and complex such as learning to drive a car. They are particularly important during cognitive learning and the sensorimotor stage described in Piaget's theory of cognitive development.
Step-by-step explanation:
Manual cues are most effective during the initial stages of learning, particularly when the task is novel and complex. This period is marked by the need for concentrated effort and attention as one tries to understand and remember the procedures involved in completing the task. For example, cognitive learning in driving a car requires one to actively pay attention to manual cues such as how to start the engine, use the brakes, and handle turns. As proficiency increases, the need for these cues diminishes as the actions become more automated.
Specifically, manual cues are crucial during the sensorimotor stage, as proposed by Piaget's theory of cognitive development. This stage, which occurs from birth through age 2, is when children learn about the world through their senses and motor behavior. Although this stage primarily refers to early childhood development, the concept can be extrapolated to learning new skills at any age where sensory and motor input is foundational for skill acquisition.