In the study of man at work several indices can be used to identify loading aspects of task performance. Some researchers emphasize the analysis of human behavior and production figures while others stress the measurement of (psycho)physiological data. In this presentation the necessity of an integration of both types of indices will be put forward and will be illustrated by the results of some field studies. These results indicate that the combined analysis of cardiovascular indices and observational data is useful in identifying mental loading aspects during task performance. Especially, changes in heart rate are sensitive to changes in workload. The integrated analysis seems a fruitful approach in the study of employees working in an office environment and could be used in usability tests.

The presentation during the conference will consist of a demonstration of the program CAMERA+, designed to integrate and analyze both observational and physiological data.