Thesis - Instituto de Telecomunicações

Chapter 3Information Sources - HCI andPhysiological SignalsCreating a database with human-computer interaction and physiological signals was oneof the tasks performed in the context of the present research. To study new behavioralbiometric traits, searching for patterns that could be associated with a subject’s identity,we needed a set of behavioral sources.The efforts to undergo a data acquisition task were planned in order to create experimentalscenarios where the collected signals could be used in other research problems.Specifically, we were interested in acquiring data that could be used with the two-foldpurpose of human identification and recognition of cognitive/affective states. This dataacquisition project was coined HiMotion.The focus on human-computer interaction directed the development of a HCI recordingsystem, integrated with the cognitive tests. The physiological signals needed a preparationplan for all the procedures related to the sensors placement and signal quality verification.This research was conduced by Pattern Recognition and Communication Theory Group(TCRP) of Instituto de Telecomunicações, with the collaboration of Escola Superior deTecnologia (EST) and INSTICC.In this chapter we describe the implemented experimental setup, procedures and thestructure of the acquired data. Firstly, we detail the characteristics of the collected signals,in sections 3.2 and 3.3. In section 3.4 we describe the materials and methods used for the35