Original sentence: All papers are cited in the Psychometric literature.Schönemann, in a number of publications has stated that the statistical heritability estimates used for most twin studies rest on restrictive assumptions which are usually not tested, and if they are, are often found to be violated by the data.Some argue that this condition is routinely violated by all correlation matrices of reasonable size, and thus, Schönemann argues, g does not exist..
Edited sentence: All papers are widely cited in the Psychometric literature.It is now generally acknowledged that this condition is routinely violated by all correlation matrices of reasonable size, and thus, Schönemann argues, g does not exist...Schönemann, in a number of publications has shown that the statistical heritability estimates used for most twin studies rest on restrictive assumptions which are usually not tested, and if they are, are often found to be violated by the data