An experimental study of field dependency in altered Gz environments

ABSTRACT

Failure to address extreme environments constraints at the human-computer interaction level may lead to the commission of critical and potentially fatal errors. This experimental study addresses gaps in our current theoretical understanding of the impact of ±Gz accelerations and field dependency independency on task performance in human-computer interaction. It investigates the effects of ±Gz accelerations and field dependency independency on human performance in the completion of perceptual-motor tasks on a personal digital assistant (PDA). We report the results of a controlled experiment, conducted in an aerobatic aircraft under multiple ±Gz conditions, showing that cognitive style significantly impacts latency and accuracy in target acquisition for perceptual-motor tasks in altered ±Gz environments and propose design guidelines as countermeasures. Based on the results, we argue that developing design requirements taking into account cognitive differences in extreme environments will allow users to execute perceptual-motor tasks efficiently without unnecessarily increasing cognitive load and the probability of critical errors.

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INDEX TERMS

Primary Classification:
  H. Information Systems
  H.1 MODELS AND PRINCIPLES
      H.1.2 User/Machine Systems
          Subjects: Human factors

Additional Classification:
  H. Information Systems
  H.1 MODELS AND PRINCIPLES
      H.1.2 User/Machine Systems
          Subjects: Human information processing; Software psychology
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)
          Subjects: Evaluation/methodology; Theory and methods

General Terms:
Design, Experimentation, Human Factors, Performance, Theory

Keywords:
comparative informatics, extreme environments, mobile devices, perceptual style, target acquisition