This literature review summarizes what is currently known about the agreement among six measures of writing skills. Three of these methods involve the application of human judgment in scoring or rating a piece of writing: holistic, analytical, and primary trait scoring. Two methods involve anatomical or taxonomic analysis of a piece of writing: computer analysis and syntactic analysis. The final method involves the use of objective (usually multiple-choice) tests of writing-related skills. The research on relationships among the various measures of writing skills admits of relatively few well-established generalizations. Relationships among some pairs of measures have been well researched, while relationships among other pairs of measures have been virtually untouched by empirical studies. Aspect of National Assessment (NAEP) dealt with in this document: Procedures (Scoring). (Author/PN)