While reading a friend's status update on a social networking site, cory ignores the scrolling newsfeed and the changing advertisements on the right-hand side of the screen. cory is

selective attention

Explanation:

Selective attention -

It is the method by which , certain material or object are given attention over the other , for some specific period of time , is known as selective attention .

Attention , is basically the importance given to certain task or object , similarly , selective attention , is the importance given to selected object for a specified time period .

It is a type of natural phenomenon , where our mind it self cancel out certain things from the eyesite or thoughts .

Similarly , from the example given in the question , Cory is demonstrating the act of selective attention .

answer; cultural trait;