Strength of split-brain research?

-Supporting research -Gazzaniga shows split-brain ppts atually perfrom better than connected controls on certain task. Eg: faster at identifying the odd one out in an array of similar objects -Significant bc the fact that other researchers can replicate similar findings incrase external valdity of Sperry and imprvoes the temporal validty as they are drawing the same conclusions -Supports Sperry's earlier finding of 'left brain' and 'right brain' being distinct