A basketball shot determination system for use with a basket and a portable electronic device including a processing unit, a memory and an output device, the system includes a basketball, at least one sensor carried by the basketball, and a non-transient computer-readable medium. The medium contains code to direct the processor to obtain at least one attribute of a shot of the basketball towards the basket. The at least one attribute being sensed by the at least one sensor or derived from signal output by the at least one sensor. The code also directs the processor to determine whether the shot is a made basket by comparing the at least one attribute of the shot to one or more predetermined signature characteristics of a made basket, and to present output to a person based on the determination of whether the shot is a made basket.