Psychophysical investigation of vigilance decrement in jumping spiders: overstimulation or understimulation?

Animal Cognition
Bonnie HumphreyXimena J Nelson

Abstract

The inability to maintain signal detection performance with time on task, or vigilance decrement, is widely studied in people because of its profound implications on attention-demanding tasks over sustained periods of time (e.g., air-traffic control). According to the resource depletion (overload) theory, a faster decrement is expected in tasks that are cognitively demanding or overstimulating, while the underload theory predicts steeper decrements in tasks that provide too little cognitive load, or understimulation. Using Trite planiceps, a jumping spider which is an active visual hunter, we investigated vigilance decrement to repetitive visual stimuli. Spiders were tethered in front of two stimulus presentation monitors and were given a polystyrene ball to hold. Movement of this ball indicates an attempt to turn towards a visual stimulus presented to a pair of laterally facing (anterior lateral) eyes for closer investigation with high acuity forward-facing (anterior median) eyes. Vigilance decrement is easily measured, as moving visual stimuli trigger clear optokinetic responses. We manipulated task difficulty by varying the contrast of the stimulus and the degree of 'noise' displayed on the screen over which the stimulus mov...Continue Reading

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Citations

Mar 26, 2019·Human Factors·Robert Earl PattersonAmanda Christensen-Salem
Mar 4, 2021·The Journal of Experimental Biology·Margaret BruceElizabeth M Jakob
Apr 30, 2021·The Journal of Experimental Biology·Margaret BruceElizabeth M Jakob
Jul 16, 2021·PLoS Biology·Massimo De AgròPaul S Shamble

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