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Prompts and instructional control: full physical prompting is the most intrusive form because it physically guides every movement of the learner, leaving almost no room for independent initiation or correct responding. It’s used when the learner cannot perform the task with any less assistance, and the purpose is to establish the correct response and then fade to less intrusive prompts. Because it provides the most help and the least opportunity for the learner to respond on their own, it sits at the top of the prompt hierarchy.

Modeling prompts, where you demonstrate the action for the learner to imitate, and gestural prompts, which give a cue like pointing without touching, offer less guidance and allow more independent responding. So the statement is true: full physical prompting is the most intrusive type.