multitasking and stroke rehab

I know lots of us want to get back to multitasking but if you believe the research we never were able to do it.

http://www.ccbi.cmu.edu/news/sandiegouniontribune-dualtask.html
Scientists have bad news for people who think they can deftly drive a car while gabbing on a cell phone.
The first study using magnetic resonance images of brain activity to compare what happens in people's heads when they do one complex task, as opposed to two tasks at a time, reveals a disquieting fact: The brain appears to have a finite amount of space for tasks requiring attention.

The neurologica blog gives us this statement; Most people cannot effectively multitask, even if they think they can. Only about 2.5% of people can genuinely multitask – perform two demanding cognitive tasks simultaneously without both suffering.
http://theness.com/neurologicablog/?p=3123

And this famous test pretty much proves you can't, I failed it. from Prof. Simons's YouTube channel;
http://www.youtube.com/profsimons select the selective attention test.

Rebecca Dutton blogs about it here:
http://homeafterstroke.blogspot.com/2011/03/only-magic-bullet-ive-found.html
basically as a stroke survivor you have to stop multitasking.

My most obvious occurrence of this was being told vocally by my wife to pick up 3 items from the grocery store. I ended up having to go to the store 3 times to get all the items.