It occurred to me that I have reached important insights into human behavior that it would be negligent of me to withhold from the world, so here they are:
The Cheerleader Effect: The cheerleader effect describes a human perception issue where pictures of any woman in a group are often considered more attractive than a picture of that woman alone (this may apply to men as well, but I have always heard it referred to women). Apparently women exploit this effect by posting pictures on dating sites that show them in groups of their friends rather than alone. Anyway, I have developed two corollaries:
- Polo Shirt Effect: Polo shirts in a store appear more desirable when grouped with other similar shirts in an array of colors than when presented alone. This effect is strong enough to trump the paradox of choice, where offering consumers more choices can tend to flummox them and cause them to buy less. I believe arrays of multi-hued polo shirts presented together increase purchases of these shirts.
- Christmas Tree Effect: We almost never buy ornaments for our tree. 95% are individually ugly, but meaningful, constructions by our kids over the years. The rest are what remain after breakage of some commercial ornaments we bought 20 years ago on deep discount in the after-Christmas sales. But a tree constructed of these ornaments is beautiful. So ornaments look far better when massed on a tree than they look individually.
Towards A Theory of Pedestrian Behavior: One of the things I enjoy is urban running -- ie running through the streets of cities. When we travel, this is one of my favorite ways to see cities, and it also helps me run further because I do not get bored. But trying to run through sometimes crowded pedestrian areas can be frustrating, since one is trying to move faster than the crowd and the crowd typically does not expect a runner coming up behind them on the sidewalk. As a result of many such runs, I have developed two laws of pedestrian behavior:
- Groups of pedestrians will expand to fill the width of the space allotted. If the width changes, groups of pedestrians will respond very quickly and expand their group spacing to fill that width. While this behavior is almost certainly natural, it is almost impossible to distinguish a group walking naturally from one purposefully trying to block passage by a faster pedestrian. Corollary: Groups too small to fill the width of a passage or sidewalk will weave.
- Groups of pedestrians, everything else being equal, will choose to pause and congregate at the bottleneck in any sidewalk, thus constricting an already narrow passage. DisneyWorld is a great location for spotting this behavior. Corollary: A disproportionate number of people will choose to stop right at the exit door from an jetway when exiting an aircraft.