| Summary: | In order to make good decisions about the design of information systems, an essential skill is to understand process models of the business domain the system is
intended to support. Yet, little knowledge to date has been established about the factors that affect how model users comprehend the content of process models. In this study, we use theories of semiotics and cognitive load to theorize how model and personal factors influence how model viewers comprehend the syntactical information of process models. We then report on a four-part series of experiments,
in which we examined these factors. Our results show that additional semantical information impedes syntax comprehension, and that theoretical knowledge eases
syntax comprehension. Modeling experience further contributes positively to comprehension efficiency, measured as the ratio of correct answers to the time taken to provide answers. We discuss implications for practice and research.
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