attention deficit (hyperactivity) disorder noun

An abnormal inability to concentrate for more than very short periods of time

attention line noun

A line in a letter used to indicate the particular employee of an organization to whom the document is addressed

attention span noun

The length of time for which a person can concentrate

attention value noun (advertising)

The degree to which an advertisement has been noticed or remembered by a reader or viewer

draw (someone's) attention to

To direct (someone's) notice towards

pay attention

1. To listen or concentrate carefully
2. To take particular notice

selective attention (behaviourism)

The aspect of perception that implies a readiness to respond to a particular stimulus or aspects of it