People generally estimate tall glasses as holding more liquid than wide ones of the same volume. They also focus their pouring attention on the height of the liquid they are pouring and insufficiently compensate for its width.

It was basically an 'out of sight, out of mind' demonstration. The less visible and less convenient the candy, the less people thought about it and were tempted.

This means that the moviegoers were unaware that the exceptional amount they ate was due to the size of the container.

People say, 'Oh, the bartender knows what he's doing.' Well, the bartender does know what he's doing in a lot of cases, but he falls victim to these illusions.

We're finding that portion size can influence intake as much as taste. Large packages and containers can lead to overeating foods we do not even find appealing.

If a person wants to limit how much they consume, it's better if you pour into a tall, skinny glass. If as a host you want to limit what people drink, you better use tall, skinny glasses. You will be less likely to pour too much.

Also, with men, there's a preference toward comfort food that's a little more healthy, like meat, pasta and potatoes. Women choose things like chips, cookies, chocolate and cake.

For an individual consumer, the money and effort spent purchasing these products is not trivial ? as many as 12 percent of purchased products are never used and eventually discarded. By understanding why we buy products we never use, we can change our purchase and usage habits to reduce product abandonment, thereby saving money and reducing waste.

You don't drop 2 pounds in two days. You don't see your cholesterol cut in half.