Finally, improvement.

Psychology IS considered a science you know?

What explained is that science requires a lot of observations of a lot different situations, and preferably same situation which yields the same result when same input is given. If that's not case, we may either suspect quantum physics, or more realistically, we don't know all the variables yet.

When playing with humans, this is actually getting quite tabooish for some. It's like gene-manipulating on a way lower scale.