Why did the colonists start wearing moccasins? Shoes became scarce and expensive.
The colonists liked moccasins better.
England would not send shoes.
They were more comfortable.

cuz the Indians traded to them when they was at peace I think...

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

answer; ///relational devaluation;