For many years, meeting satisfaction has been a key outcome variable in experimental group support systems (GSS) research. GSS research results on meeting satisfaction are conflicting, reporting positive, negative, or no effects. Unfortunately, no causal model of meeting satisfaction has been developed that could explain these effects. This paper derives satisfaction attainment theory (SAT), a causal model of meeting satisfaction. It further presents a survey instrument for measuring the constructs in the model. This instrument was statistically validated with a field study involving 156 working professionals. Furthermore, the field study provided support for the hypotheses that were derived from SAT's propositions. A number of implications for future GSS research on meeting satisfaction are identified.