The Galileo System, a variant of metric multidimensional scaling, is used in this paper to analyze over-time changes in social networks. The paper first discusses the theoretical necessity for the use of this procedure and the methodological problems associated with its use. It then examines the air traffic network among 31 major cities in the…

Limitations of the confirmatory factor analysis conducted by H. W. Marsh to demonstrate the multidimensionality of a rating form to assess student evaluation of teaching effectiveness are discussed. A secondary analysis suggests that dimensionality is not stable across solutions and a global factor can be retrieved. (SLD)