The Cocktail Party Effect--I am a "super tasker"

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 Melinda Beck on Lunch Break looks at the "cocktail party effect," in which people are able to focus on one conversation while being aware of conversations going on around them. Researchers say we can train our brains to maximize this kind of awareness.
.You're at a party. Music is playing. Glasses are clinking. Dozens of conversations are driving up the decibel level. Yet amid all those distractions, you can zero in on the one conversation you want to hear.

This ability to hyper-focus on one stream of sound amid a cacophony of others is what researchers call the "cocktail-party effect." Now, scientists at the University of California in San Francisco have pinpointed where that sound-editing process occurs in the brain

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This article reminded me of something.

We largely see what we expect to see," says Daniel Simons, one of the study's creators and now a professor of psychology at the University of Illinois.

I think these words are true and was wondering how it can become an impediment to handicapping.  Do we really look at the PPs and replays with an open mind, or do we see what we expect to see?