Multimodal Detection and Recognition Performance of Sonar Operators

Abstract

Trained sonar operators participated in a detection and classification task. Stimuli were presented in three conditions: auditory and visual modalities independently and simultaneously (multimodal). The signal-to-noise ratio (SIN) was continually increased during a trial, and the elapsed time as well as the SIN level at detection and classification were recorded. The best modality for target detection was found to be target specific. However, the multimodal condition was not significantly different from the single best modality and, therefore, should be used for initial target detection in the operational setting. Differences from findings in previous studies are discussed.

Verbal redundancy in multimedia learning: When reading helps listening.

“…Research on the redundant signals effect is aimed at finding ways to enhance operational performance on bisensory tasks such as using sonar and radar (Lewandowski & Kobus, 1993). For example, the benefits of redundant bisensory stimuli for a job task or learning situation include the improved detection and recognition of sonar targets (Colquhoun, 1975;Kobus et al, 1986;Lewandowski & Kobus, 1989) and of lights and tones (Nickerson, 1973), and the improved rate of learning in bisensory redundant conditions with sea noise recordings (Halpern & Lanz, 1974).…”