Blindfolded people were observed to clap louder when they thought they were clapping alone than when they thought they were clapping with others. this best illustrates

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.