concentrativeness

from The Collaborative International Dictionary of English v.0.48

Concentrativeness \Con*cen"tra*tive*ness\, n.
   1. The quality of concentrating.
      [1913 Webster]

   2. (Phren.) The faculty or propensity which has to do with
      concentrating the intellectual the intellectual powers.
      --Combe.
      [1913 Webster]