This is what it is written in the book

"Who's in charge " by Michael Cazzaniga

Unless mr Gazzaniga is a charlatan
But I read similar things also in other books
Also the book was attached to the italian version of " American Science " magazine
I suppose they select the authors

Coming to your questions

The right brain is a good "perceptor" but a poor "interpreter"
The left brain is good "interpreter" but a poor " perceptor "

All the inputs from right eyes/ears/hands go to the left emisphere and viceversa
The two emisphere are normally connected so , in general , it does not make any differece

For a split brain the difference is drammatic

If the subjetc gets inputs only via the left body then he behaves like a child viceversa he can provides wrong but somehow logic answers to simple questions
The reason being that the left brain is smart but his perceptions are confused

In the book there many examples