Putting opponent all-in on the river ...

[gotmarc]

You bet the amount you think your opponent will be most likely to call.

If you think your opponent will view a bet of $14.47 as an attempt to steal the pot--Bet that amount.

If you think your opponent will view an amount equal to his stack ($4.57) as a sign of weakness then bet that amount.

YOu can do a similar anaylisis on all of these scenerios but a lot of it has to do with your perception of your opponenet as well as your opponents image of you. A.K.A. your table image