Batter Interference

[Andy]

Sounds like all of the replies are right on target, I can't add anything there. I did, however, think of this question in relation to this thread.

Is a throw or an attempt at a throw (ie. releasing the ball) required by the catcher in order to have interference on the batter?

Now, I don't mean "by rule", I'm trying to get individual philosphies on this play. To my way of thinking, I can't always tell if the catcher held the ball because of the position of the batter or if she held the ball because she didn't think the throw would get the runner. I'm interested in what all of you think.