Sense of control depends on fluency of action selection, not motor performance

► Priming actions speeds responding and increases sense of agency over action effects. ► Increasing prime-target delays reverses priming of reactions, but not of agency. ► Monitoring of performance does not strongly contribute to sense of agency. ► Instead, sense of agency depends on fluency of early action selection signals. ► A metacognitive 'feeling of doing' contributes to sense of agency over action effects.