Western non-interpolations

Western non-interpolations is the term named by F. J. A. Hort of the shortest texts of all the New Testament text types. The Alexandrian text is generally terse or concise; the Western text is larger and paraphrased at places; the Byzantine text is a combination of those two. Nevertheless, the Western text is in certain places shorter than the Alexandrian text. All these shorter readings Hort named "western non-interpolations". Since the 19th century, scholars have preferred the shorter reading. It was the authentic text according to B. F. Westcott and F. J. A. Hort. When they printed "The New Testament in the Original Greek" (1882), in almost all cases, it followed the Alexandrian text with the few exceptions that use the Western non-interpolations instead. According to Westcott and Hort, on some rare occasions Western textual witnesses have preserved the original text, against all other witnesses. 
Influence on the New Testament editions.
The "Western non-interpolations" were not included in the main text of Westcott-Hort edition (1881), but were instead moved to the footnotes. The editions of Nestle and Nestle-Aland did the same. In 1968, "the editorial committee (or more precisely its majority) decided to abandon the theories of Westcott-Hort and the Western non-interpolations." Since 1968 they are included in the main text, but marked with brackets.