Action recognition hinges on the ability to discriminate actions, e.g. to tell a fist-bump from a punch apart.
Surprisingly very few studies used action discrimination tasks to examine action recognition.
Does it matter which task is being used for assessing action recognition?
We examined whether different action recognition tasks lead to the same recognition performance.
Task matters: the two recognition tasks (action vs movement discrimination) led to very different recognition performance.
One cannot necessarily generalize findings across recognition tasks.
Action recognition should also be assessed with action discrimination tasks.