Why are so many Presidents left-handed?

I often notice left-handedness, perhaps because I am a left-hander.  A few days ago, while watching a video of the most recent Hillary Clinton-Barack Obama debate, I noticed that Barack Obama was left-handed (he was taking notes with his left hand).   That video reminded me that Bill Clinton was also…

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The “halo effect”: yet another cognitive Achilles’ Heel

Here's another obstacle to objectively evaluating a person.  There are many aspects of people.  If you are attracted to one aspect strongly, you might (subconsciously) allow that characteristic to serve as a token for that person's other personality characteristics.   As this article from PsyBlog indicates, this is called the "Halo…

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