Feature presence/absence modifies the event rate effect and cerebral hemovelocity in vigilance performance

2004 ◽  
Author(s):  
Todd D. Hollander ◽  
Joel S. Warm ◽  
Gerald Matthews ◽  
Kevin Shockley ◽  
William N. Dember ◽  
...  
Keyword(s):  
Event Rate ◽  
Rate Effect ◽  
Vigilance Performance ◽  
Cerebral Hemovelocity

Feature Presence/Absence Modifies the Event Rate Effect and Cerebral Hemovelocity in Vigilance Performance

2004 ◽  
Vol 48 (16) ◽  
pp. 1943-1947 ◽  
Author(s):  
Todd D. Hollander ◽  
Joel S. Warm ◽  
Gerald Matthews ◽  
Kevin Shockley ◽  
William N. Dember ◽  
...  
Keyword(s):  
Event Rate ◽  
Rate Effect ◽  
Vigilance Performance ◽  
Cerebral Hemovelocity

Effects of Background Event Rate and Critical Signal Amplitude on Vigilance Performance

1974 ◽  
Vol 38 (3_suppl) ◽  
pp. 1175-1181 ◽  
Author(s):  
Kurt R. Metzger ◽  
Joel S. Warm ◽  
Roderick J. Senter
Keyword(s):  
Event Detection ◽  
Detection Probability ◽  
Event Rate ◽  
Signal Amplitude ◽  
Overt Response ◽  
Vigilance Performance ◽  
Background Event ◽  
Critical Signal

Ss monitored a display consisting of the repetitive presentation of pairs of movements of a bar of light. A neutral background event, for which no overt response was required, was a double deflection of 24 mm. The critical signal for detection was a longer deflection in the second movement within an event. Detection probability was greater for incremental excursions of 33% relative to 8.3% of the base movement. This effect was enhanced twofold when the event rate in which the signals were embedded was 21 as compared to 6 events/min. The results are considered in terms of the elicited observing rate hypothesis proposed by Jerison (1970).

scholarly journals A Comparison of Cerebral Hemovelocity and Blood Oxygen Saturation Levels during Vigilance Performance

2010 ◽  
Vol 54 (18) ◽  
pp. 1345-1349 ◽  
Author(s):  
Matthew E. Funke ◽  
Joel S. Warm ◽  
Gerald Matthews ◽  
Michael Riley ◽  
Victor Finomore ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Blood Oxygen ◽  
Blood Oxygen Saturation ◽  
Vigilance Performance ◽  
Cerebral Hemovelocity

Effects of Signal Regularity and Salience on Vigilance Performance and Cerebral Hemovelocity

2002 ◽  
Vol 46 (17) ◽  
pp. 1654-1658
Author(s):  
Todd D. Hollander ◽  
Joel S. Warm ◽  
Gerald R. Matthews ◽  
William N. Dember ◽  
Raja Parasuraman ◽  
...  
Keyword(s):  
Signal Detection Theory ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Vigilance Performance ◽  
Regularity Effect ◽  
Right Cerebral Hemisphere ◽  
Decision Making Factors ◽  
Cerebral Hemovelocity ◽  
The Right ◽  
High Salience

The signal regularity effect — enhanced performance efficiency when critical signals for detection appear in a temporally regular as opposed to an irregular manner- has a long history in vigilance research. However, the precise conditions under which this effect can be elicited have not been identified. Toward that end, this study demonstrates that the effect is limited to low salience signals, perhaps because the effort needed to generate veridical temporal expectancies is unnecessary with high salience signals. Additionally, using signal detection theory indices ( d' & c) and neuroimaging of cerebral blood flow via transcranial Doppler sonography, this study also shows that the signal regularity effect is rooted in sensing rather than decision-making factors and that it is localized in the right cerebral hemisphere.

Effects of Demand Transitions on Vigilance Performance and Perceived Workload

1995 ◽  
Vol 39 (21) ◽  
pp. 1375-1379 ◽  
Author(s):  
Brian W. Moroney ◽  
Joel S. Warm ◽  
William N. Dember
Keyword(s):  
Event Rate ◽  
Mental Workload ◽  
Task Demand ◽  
Experimental Session ◽  
Vigilance Performance ◽  
Mental Demand ◽  
Perceived Workload ◽  
Nasa Tlx ◽  
Low Levels ◽  
Upper Level

This study examined the effects of transitions in task demand on vigilance performance and perceived mental workload. Task demand was manipulated through variations in background event rate–the rate of cascade of neutral events which must be monitored in order to detect critical signals. As is typical in vigilance research, overall performance varied inversely with event rate in all phases of the study. The post-transition performance of observers shifted from a fast-to-slow event rate (high-to-low task demand) remained below that of their continuous slow event rate controls, and was thus unaffected by the shift. In contrast, the post-transition performance of monitors shifted in the opposite direction, slow-to-fast event rate, was affected by the shift. In this case, the performance of the shifted observers fell below that of their continuous fast event rate controls. These results challenge prior findings indicating that psychophysical contrast is the representative outcome of shifts in information-processing demand in vigilance tasks (Krulewitz, Warm, & Wohl, 1975). Consistent with previous findings, workload scores, as indexed by the NASA-TLX, fell at the mid-to-upper level of the scale. Shifted observers who experienced both high and low levels of task demand during the vigil showed differences in composite ratings on the Mental Demand subscale. These results serve to caution that workload measurements obtained through the NASA-TLX at the end of an experimental session containing variations in task demand do not simply reflect an averaging of the observer's demand experiences.

Effects of sensory modality on vigilance performance and cerebral hemovelocity

2006 ◽  
Author(s):  
Tyler H. Shaw ◽  
Joel S. Warm ◽  
Gerald Matthews ◽  
Michael Riley ◽  
Ernest M. Weiler ◽  
...  
Keyword(s):  
Sensory Modality ◽  
Vigilance Performance ◽  
Cerebral Hemovelocity

scholarly journals A Comparison of Cerebral Hemovelocity and Blood Oxygen Saturation Levels During Vigilance Performance

2010 ◽  
Author(s):  
Matthew E. Funke ◽  
Joel S. Warm ◽  
Gerald Matthews ◽  
Michael Riley ◽  
Victor Finomore ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Blood Oxygen ◽  
Blood Oxygen Saturation ◽  
Vigilance Performance ◽  
Cerebral Hemovelocity

A Test of the Reverse-Event Rate Effect in Children

2000 ◽  
Author(s):  
Jennifer Tucci ◽  
Cynthia Laurie Rose ◽  
L. Bennett Murphy
Keyword(s):  
Event Rate ◽  
Rate Effect
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