The finding that attention can spread within an object, thereby, enhancing detection at other places within the object is referred to as
a. ? spatial drift
b. ? spreading activation
c. ? same-object advantage
d. ? object location invariance

The finding that attention can spread within an object, thereby, enhancing detection at other places within the object is referred to as same-object advantage effect (SOA). The effect is that the performance of observers who are judging two targets is better (faster and/or more accurately) when they are from the same object than when they are from different objects.