Study on human behavior finds 90% of the population falls into 4 categories; researchers say results are useful for negotiating or for when people need to help each other.
Melissa Breyer, Treehugger
Mon, 01/16/2017 - 7:55am
Study on human behavior finds 90% of the population falls into 4 categories; researchers say results are useful for negotiating or for when people need to help each other.