A Signal Detection Analysis of the Effects of Workload, Task-Critical and Likelihood Information on Human Alarm Response

2005 ◽  
Vol 49 (17) ◽  
pp. 1513-1517 ◽  
Author(s):  
Ernesto A. Bustamante
Keyword(s):  
Signal Detection ◽  
Response Bias ◽  
Secondary Task ◽  
Alarm System ◽  
Alarm Response ◽  
Alarm Signals ◽  
Critical Information ◽  
Detection Analysis ◽  
High Workload ◽  
Signal Detection Analysis

The purpose of this study was to examine the effects of task-critical and likelihood information on participants' sensitivity and bias to alarm signals under varying levels of workload. Participants performed a complex primary task at the same time they performed a secondary task. Likelihood information was manipulated through the use of either a Binary Alarm System (BAS) or a Likelihood Alarm System (LAS). As expected, task-critical and likelihood information significantly increased participants' sensitivity, and this varied across workload levels. Participants benefited from task-critical information only when they were interacting with the BAS. However, participants benefited from likelihood information regardless of task-critical information, particularly under high-workload conditions. Furthermore, task-critical information increased participants' response bias under low workload, making them less likely to respond to alarm signals. These results demonstrated the superior advantage of an LAS over a traditional BAS and showed support for the use of an LAS as a way to mitigate the cry-wolf effect above and beyond task-critical information.

Signal Detection Analysis of Effect of White Noise Intensity on Sensitivity to Visual Flicker

1979 ◽  
Vol 48 (3) ◽  
pp. 791-798 ◽  
Author(s):  
Dan W. Harper
Keyword(s):  
Signal Detection ◽  
White Noise ◽  
Response Bias ◽  
Noise Intensity ◽  
Rating Scale ◽  
Auditory Stimulation ◽  
Future Research ◽  
Cortical Arousal ◽  
Detection Analysis ◽  
Signal Detection Analysis

Rating scale estimates of sensitivity to visual flicker were obtained from three subjects under 10 different intensities of auditory stimulation. Results indicated reliable “sawtooch”-like changes in sensitivity as a function of increasing intensity of white noise. No systematic and reliable changes were found in estimates of response bias. Theory and future research are discussed with reference to the possible contribution of cortical arousal.

Signal Detection Analysis of Visual Flicker in Deaf and Hearing Individuals

1980 ◽  
Vol 51 (3) ◽  
pp. 839-843 ◽  
Author(s):  
Michael Bross ◽  
Hannelore Sauerwein
Keyword(s):  
Signal Detection ◽  
Response Bias ◽  
Forced Choice ◽  
Resolving Power ◽  
Stimulus Probability ◽  
Sensory Sensitivity ◽  
Detection Analysis ◽  
Signal Detection Analysis ◽  
Flicker Task ◽  
Sensory Compensation

A comparison of deaf and hearing subjects on temporal visual resolving power was conducted within a signal-detection paradigm. Subjects were required to make forced-choice judgments of a visual-flicker task under three stimulus probability conditions (0.25, 0.50, and 0.75). A total of 600 trials were given each subject from which d′ and Beta, indices for sensory sensitivity and response bias respectively, were computed. No significant differences existed on sensory sensitivity or response bias which questions some traditional assumptions about sensory compensation.

Laterality Effects in Judgment of the Identity and Position of Letters: A Signal Detection Analysis

1976 ◽  
Vol 28 (1) ◽  
pp. 115-121 ◽  
Author(s):  
Sally Robertshaw ◽  
Michael Sheldon
Keyword(s):  
Signal Detection ◽  
Response Bias ◽  
Rating Scale ◽  
Rectangular Matrix ◽  
Detection Analysis ◽  
Point Rating Scale ◽  
The Matrix ◽  
A Cell ◽  
Signal Detection Analysis

In two experiments subjects received 100 ms tachistoscopic presentations, either to left or right of fixation, of a rectangular matrix of 12 cells. On each trial three cells were filled, each with a different symbol drawn from a set of 12 letters and digits. In one (the “letter” experiment) subjects had to decide whether a particular letter (nominated at the end of the trial) had been one of the three presented. In a second (the “position” experiment) they had to decide whether a cell in the matrix (again nominated at the end of the trial) had been one of those that contained a symbol. Judgments were made on a four-point rating scale, and measures of sensitivity and response bias were calculated. In the letter experiment sensitivity was greater for presentations to right of fixation, and in the position experiment for those to left.

Signal-Detection Analysis of the Müller-Lyer and the Horizontal-Vertical Illusions

1994 ◽  
Vol 79 (3) ◽  
pp. 1299-1304 ◽  
Author(s):  
Gary M. Brosvic ◽  
Nancy A. Civale ◽  
Patricia Long ◽  
Deborah Kieley ◽  
Kathryn Kristoff ◽  
...  
Keyword(s):  
Signal Detection ◽  
Response Bias ◽  
Signal Strength ◽  
Perceptual Error ◽  
Lyer Illusion ◽  
Detection Analysis ◽  
Signal Detection Analysis ◽  
Response Biases

Perceptual error in the Müller-Lyer and the Horizontal-Vertical illusions was quantified using nonparametric signal-detection measures of sensitivity and response bias. Sensitivity scores were positively related to signal strength with the greatest values observed for the strongest signals. Sensitivity at each signal strength did not differ between the two illusions. Response-bias scores were inversely related to signal strength, with the most conservative biases observed for the strongest signals. Response biases for each signal strength were significantly more conservative for the Horizontal-Vertical than for the Müller-Lyer illusion.

Temporal Auditory Acuity in Blind and Sighted Subjects: A Signal Detection Analysis

1982 ◽  
Vol 55 (3) ◽  
pp. 963-966 ◽  
Author(s):  
Michael Bross ◽  
Myra Borenstein
Keyword(s):  
Signal Detection ◽  
White Noise ◽  
Response Bias ◽  
Auditory Sensitivity ◽  
Sensory Sensitivity ◽  
Detection Analysis ◽  
Signal Detection Analysis ◽  
Auditory Acuity ◽  
Sensory Compensation

Temporal auditory sensitivity was compared in five adventitiously blind and five normally sighted subjects in a signal-detection paradigm. Following determination of individual auditory flutter fusion (AFF) thresholds the subjects were required to make forced-choice responses between a fluttering and fused white noise under stimulus probabilities of 0.25, 0.50, and 0.75. From these data indices of sensory sensitivity ( d') and response bias (Beta) were computed and compared. Analysis indicated no significant differences in auditory sensitivity between the two groups. These findings further weaken the traditional hypothesis of sensory compensation.

Sign in / Sign up

Export Citation Format

Share Document