Before the training, pay attention to people’s faces for a few days. Write down how many times I learn something useful or interesting. After a while (if I observe any learning effect I wait until it levels off), I take the training, and do the same test afterwards.
One idea for a cheap plan:
Before the training, pay attention to people’s faces for a few days. Write down how many times I learn something useful or interesting. After a while (if I observe any learning effect I wait until it levels off), I take the training, and do the same test afterwards.