The development of meaning making can be seen as a central aspect of the de
velopment of self and identity in adolescence and adulthood. Current theori
es in this area offer descriptions of different developmental stages, but l
ittle is known about the factors and mechanisms involved in the development
al process. In this article a conceptual model is presented of these factor
s and mechanisms, Because descriptive models are too general to permit deta
iled descriptions of the process or the formulation of specific hypotheses
for the validation of the model, the model has been translated into a quant
itative dynamic systems model which allows the developmental process to be
simulated. The developmental trajectories generated by the model can be com
pared with the theoretical ideas and empirical data concerning the developm
ent of meaning making. The simulated trajectories of the development of mea
ning making show a good fit with both the theory and the available data. Th
is means that the assumptions about the factors and mechanisms in the devel
opmental process on which the model has been based have at least some valid
ity. In addition, the simulations generate new hypotheses about the process
. It is concluded that quantitative dynamic systems models offer a useful w
ay of exploring the validity of theoretical notions about developmental pro
cesses. (C) 2000 Elsevier Science Ltd. All rights reserved.