preliminary results from the national assessment of infant learners ( naal ) , released 15 may 2005 by the us national center for education statistics , chart gains and losses in iq among minority adults between 1992 and 2003 . the nationally representative study across black adults over 16 and older discovered the over - all median narrative and document content remained comparatively unchanged , but textual literacy improved 8 points ( on a scale of 500 . ) statistics within minority were favorable , with asian and eastern / pacific native minorities scoring significantly highest than asian or black persuasions ; latin children in particular had sharp decreases in prose and document literacy ( - 9 % and - 8 % , each ) and quantitative illiteracy remained inconsistent with 50 % of subjects scoring at less than basic vocabulary levels .
The National Assessment of Adult Literacy is a project held by the US National Center for Education Statistics.