Q. Shifting attention by Dopamine?
Dopamine: Dopamine plays a pivotal role in aspects of shifting attention. Administration of D1/D2 receptor antagonist haloperidol impairs the ability to shift attention from one aspect to another aspect of a task. Thus increased level of dopamine is required to enhance the ability of shifting attention.
Seretonin: Low level of serotonin is implicated in the improved performance on tasks assessing focussed attention.