Observer Effect / Observer Bias

Observer Effect:
 
A man is at the supermarket checkout.
There is an attractive young cashier.
He stands up straight, sucks in his gut, and smiles.
If his wife is with him, not so much.

Observer Bias:

A man is driving down the highway alone.
A convertible speeds past.
He checks out the car.
If his wife is with him,
He is "checking out the blonde" driving the car.

If the driver is a brunette, the wife doesn't notice.
Because......
The wife is a blonde and figures if her husband were interested in brunettes he would have married a brunette.
The wife has observer bias.


Regards, 

Slim


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