The intake and processing of information by architects was studied by analysing the protocols of twelve architects who worked on a design thinking aloud. The analysis was carried out using a descriptive model of the design process. The model itself is based on the analysis of the task and a psychological analysis of the capacities and limitations of the designer. It explicitly describes the activities, the use of knowledge, and the intake of information during each part of the process. Some of the practical implications for environment-behaviour research concerning the choice of the phenomena to be studied, the communication of research findings, and the reception of the information as a function of both the knowledge of the designer and the stage of the process will be discussed in more detail.