How were the greeks able to defeat the persians?

In general, it appears that the Greeks were able to defeat the Persians because of their superior battle tactics.

For example:

At Marathon, the Persian attack on the weakened Greek center allowed the strengthened Greek flanks to attack and essentially encircle the Persians.

The greeks were able to defeat the Persians because of their superior battle tactics. Hope this helped!

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.