Dual-task performance improves and distraction is minimized when simultaneous activities rely on different cognitive resources or modalities, as supported by multiple-resource models of attention.
The claim states that dual-task performance reduces distraction when activities use different cognitive resources. Papers like [1] and [3] explicitly investigate multiple-resource models and demonstrate that interference increases when tasks share sensory modalities or information domains, supporting the premise that differing resources reduce conflict and cross-modal interference.