In one embodiment, the present invention is a method and apparatus for inferring the read status of instant messages. One embodiment of the inventive method involves displaying the instant message on the receiver's computing device and sending a message to the sender indicating a probability with which the receiver has viewed the instant message. In one embodiment, this probability is based at least in part on an amount of the instant message that is in view on the receiver's computing device and on user input that is received by the receiver's computing device, e.g., from the receiver.