The effect of reference signals in a visual vigilance task.
Criswell, Daniel Lewis
Poock, Gary K.
MetadataShow full item record
The effect of reference signals on performance in a visual vigilance task was studied under three conditions. Reference signals were presented on the same display as the real signals. In condition 1 (control)/ no reference signals were displayed. Subjects could demand reference signals whenever they wished in condition 2 (demand reference) . Reference signals were programmed at arbitrary times during the experiment in condition 3 (programmed reference) . Twenty-four subjects were used, eight in each condition. Neither the display of reference signals upon demand nor the programmed display of reference signals significantly affected the overall level of performance. However, after activation of the reference signal sequence in condition 2 (demand reference) , there was a significant short-term improvement in performance. No significant change in the rate of commissive errors was found. All three groups showed a significant deterioration of performance over time during the experiment.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Adaptive Vision-Based Guidance Law with Guaranteed Performance Bounds for Tracking a Ground Target with Time-Varying Velocity Ma, Lili; Cao, Chengyu; Hovakimyan, Naira; Dobrokhodov, Vladimir; Kaminer, Isaac (2008-08);This work extends the earlier results of authors on vision-based tracking of a ground vehicle moving with unknown time-varying velocity. The follower UAV is equipped with a single camera. The control objective is to ...
Ma, L.; Cao, C.; Hovakimyan, N.; Dobrokhodov, V.; Kaminer, I.I (AIAA, 2010-05);This work discusses vision-based tracking of a ground vehicle moving with unknown time-varying velocity. The follower unmanned aerial vehicle is equipped with a single camera. The control objective is to regulate the two- ...
Choi, Seong Hwan (1983);Military personnel encounter a variety of noise environments. During exercises, high intensity noise levels are often encountered. 24 subjects were required to respond to symbols presented under two levels of task ...