1. 
   Attention span
   Attention span is the amount of time that a person can concentrate on a task without becoming distracted. Most educators and psychologists agree that the ability to focus one`s attention on a task is crucial for the achievement of one`s goals. ==Length of the span== Estimates for the length of huma...
   Found op http://en.wikipedia.org/wiki/Attention_span
   
   
2. 
   attention span
   [n] - the length of time you can concentrate on some idea or activity
   Found op http://www.webdictionary.co.uk/definition.php?query=attention%20span
   
   
3. 
   attention span
   noun the length of time you can concentrate on some idea or activity
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=attention%20span
   
   
4. 
   attention span
   Type: Term Definitions: 1. the length of time a person can concentrate on a subject.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=83209
   
   

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