2. What is the relief between the red arrow and blue arrow?

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.

answer; decipher the motives for why people behave the way they do;

answer; all over the above; //everybody

answer; thin-slice judgments;