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An evaluation of an adaptive automation system using a cognitive vigilance task . The performance of an adaptive automation system was evaluated using a cognitive vigilance task . Participants responded to the presence of a green " K " in an array of two , five , or nine distractor stimuli during a 40-min vigil . The array with the target stimulus was presented once each minute . Participants EEG was recorded and an engagement index ( EI = 20 x beta/ ( alpha + theta ) ) was derived . In the negative feedback condition , increases in the EI caused the number of stimuli in the array to decrease while decreases in the EI caused the number of stimuli to increase . For the positive feedback condition , increases in the index caused an increase in the array size ( AS ) while decreases caused a decrease in the array size . Each experimental participant had a yoked control partner who received the same pattern of changes in array irrespective of their engagement index . A vigilance decrement was seen only for the positive feedback , experimental group .
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Intervention_Other
adaptive automation system
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Intervention_Educational
cognitive vigilance task
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Intervention_Other
adaptive automation system
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Intervention_Physical
green " K " in an array of two , five , or nine distractor stimuli during a 40-min vigil
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Intervention_Other
EEG
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Outcome_Mental
engagement index
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Outcome_Mental
number of stimuli in the array
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Outcome_Mental
EI caused the number of stimuli to increase
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Participant_Condition
EEG
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Participant_Condition
participant had a yoked control partner
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Participant_Condition
experimental group