This article explores the proposition that the appropriate use of suitable
forms of graphic communication can improve the formulation and presentation
of hypotheses in quantitative social science research. The creative nature
of scientific diagrams is discussed and the technological advances in comp
uter graphic media are seen as part of a 'visual revolution' which is marke
dly changing not only the way we see things but also the way we think and d
o things today. Brief historical views on the use of hypotheses and diagram
matic languages in science are given. The restricted use of graphic communi
cation tools in social research academic documents is discussed and the imp
ortance of using well-designed data graphics in the production and transmis
sion of scientific knowledge is highlighted. Hypotheses are conceptualised
and their importance within social research is emphasised. A methodological
approach for formulating hypotheses graphically is proposed based on the u
se of three types of language: notation, statement (ordinary language) and
diagram. Some criteria are suggested for the selection of diagram type depe
ndent on the related variables. Several examples are given covering the dif
ferent models proposed.