attention span

• IPA^(key): /əˈtɛn.ʃən spæn/

attention span (plural attention spans)

1. The length of time, or span that one can pay attention, or concentrate on one topic without becoming distracted.

   He has learning difficulties because of his short attention span.

   • 1975, Gary Dahl, The care and training of your PET ROCK‎:

     Limit your training sessions to fifteen minutes; twice each day. One half-hour session is not recommended as a rock's attention span is rather short. Remember; a bored rock is an unhappy rock.