Redaction criticism, also called Redaktionsgeschichte, Kompositionsgeschichte or Redaktionstheologie, is a critical method for the study of biblical texts. Redaction criticism regards the author of the text as editor (redactor) of his or her source materials. Unlike its parent discipline, form criticism, redaction criticism does not look at the various parts of a narrative to discover the original genre; instead, it focuses on how the redactor(s) has shaped and molded the narrative to express his theological goals.
There are several ways in which redaction critics detect editorial activity, including:
Although redaction criticism has existed since antiquity (that is, the possibility of the various gospels having different theological perspectives), three modern day scholars are regularly credited with this school's modern day development: Gunther Bornkamm, Willi Marxsen and Hans Conzelmann (see generally: Bornkamm, Barth and Held, Tradition and Interpretation in Matthew, Marxsen, Mark the Evangelist; Conzelmann, Theology of St Luke).
From these changes, redaction critics can sketch out the distinctive elements of an author/editor's theology. If a writer consistently avoids reporting, e.g., the weaknesses of the Twelve Apostles, even when there are earlier sources that provide lurid details of their follies, one could draw the conclusion that the later editor/author held the Twelve in higher esteem, either because of the editor's presuppositions, or because the editor was perhaps trying to reinforce the legitimacy of those chosen by Jesus to carry on his work. Through tracking the overall impact of this editorial activity, one can come away with fairly strong picture of the purpose of a particular writing.