Assessing the monitor warm-up time required before a psychological experiment can begin

Poth, Christian H.; Horstmann, Gernot

doi:10.20982/tqmp.13.3.p166

Cited by 23 publications

(13 citation statements)

References 12 publications

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“…To ensure luminance stability, the monitor was warmed up for at least 30 min before the experiment. This necessary warm-up time was estimated according to Poth and Horstmann (2017). Eye movements were recorded with a video-based towermounted eye tracker (Eye Link1000, SR Research, Ontario, Canada) with a sampling rate of 1,000 Hz.…”

Section: Apparatus and Stimulimentioning

confidence: 99%

Feature prediction across eye movements is location specific and based on retinotopic coordinates

2018

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With each saccadic eye movement, internal object representations change their retinal position and spatial resolution. Recently, we suggested that the visual system deals with these saccade-induced changes by predicting visual features across saccades based on transsaccadic associations of peripheral and foveal input (Herwig & Schneider, 2014). Here we tested the specificity of feature prediction by asking (a) whether it is spatially restricted to the previous learning location or the saccade target location, and (b) whether it is based on retinotopic (eye-centered) or spatiotopic (worldcentered) coordinates. In a preceding acquisition phase, objects systematically changed their spatial frequency during saccades. In the following test phases of two experiments, participants had to judge the frequency of briefly presented peripheral objects. These objects were presented either at the previous learning location or at new locations and were either the target of a saccadic eye movement or not (Experiment 1). Moreover, objects were presented either in the same or different retinotopic and spatiotopic coordinates (Experiment 2). Spatial frequency perception was biased toward previously associated foveal input indicating transsaccadic learning and feature prediction. Importantly, while this pattern was not bound to the saccade target location, it was seen only at the previous learning location in retinotopic coordinates, suggesting that feature prediction probably affects low-or mid-level perception.

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Section: Apparatus and Stimulimentioning

confidence: 99%

Feature prediction across eye movements is location specific and based on retinotopic coordinates

2018

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“…Participants performed the experiments in a dimly lit room. They viewed the pre-heated (Poth and Horstmann, 2017) computer screen (G90fB, ViewSonic, Brea, CA, USA) from a distance of 71 cm, while their right eye was tracked (Eyelink 1000, tower-mounted eye tracker, SR Research, Ottawa, Ontario, CA). They responded using a standard computer mouse.…”

Section: Experimental Setup and Tasksmentioning

confidence: 99%

Urgency disrupts cognitive control of human action

Poth

2021

Preprint

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Intelligent behavior requires cognitive control, the ability to act directed by goals despite competing action tendencies triggered by stimuli in the environment. For eye movements, it has recently been discovered that cognitive control is briefly disrupted in urgent situations (Salinas et al., 2019). In a time-window before an urgent response, participants could not help but look at a suddenly appearing visual stimulus, even though their goal was to look away from it. Urgency seemed to provoke a new visual-oculomotor phenomenon: A period in which saccadic eye movements are dominated by external stimuli, and uncontrollable by current goals. This period was assumed to arise from brain mechanisms controlling eye movements and spatial attention, such as those of the frontal eye field. Here, we show that the phenomenon is more general than previously thought. We found that urgency disrupted cognitive control also in well-investigated manual tasks, so that responses were dominated by goal-conflicting stimulus features. This dominance of behavior followed established trial-to-trial signatures of cognitive control that replicate across a variety of tasks. Thus together, these findings reveal that urgency temporarily impairs cognitive control in general, not only at brain mechanisms controlling eye movements.

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“…Before experimentation, the projector was warmed up for at least 5 min (cf. Poth & Horstmann, 2017). Auditory stimuli were presented using loudspeakers (Philips Multimedia Speaker System A 1.2 F u n P o w e r / M M S 1 0 1 , P h i l i p s , A m s t e r d a m , The Netherlands), placed 4 cm below and 45 cm to the left and right of screen center.…”

Section: Apparatus and Stimulimentioning

confidence: 99%

Phasic alertness reverses the beneficial effects of accessory stimuli on choice reaction

Poth

2019

Atten Percept Psychophys

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Humans respond faster to visual target stimuli when these are accompanied by auditory accessory stimuli. This accessory stimulus effect occurs even though accessory stimuli do not predict which response has to be made. Similar performance benefits occur when auditory stimuli serve as so-called alerting cues by preceding rather than accompanying the visual targets. This latter effect is attributed to phasic alertness, a short-lived increase of the brain's readiness for responding to external information. Phasic alertness and accessory stimulation each have been studied extensively, but it is unclear how the two work in concert. Therefore, the present study investigated how auditory alerting modulates the effects of subsequent accessory stimuli accompanying the targets of a visual choice reaction task. Results showed that accessory stimuli helped performance in the absence of alerting cues but impaired performance when alerting cues had been presented beforehand (Experiment 1). This reversed accessory stimulus effect did not seem due to expectations regarding the combination of accessory stimuli and alerting cues (Experiment 2). Together, the present findings reveal that phasic alertness changes the effects of accessory stimulation in a qualitative fashion: Alerting turns the otherwise helping accessory stimulus into a saboteur of performance.

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Assessing the monitor warm-up time required before a psychological experiment can begin

Cited by 23 publications

References 12 publications

Feature prediction across eye movements is location specific and based on retinotopic coordinates

Feature prediction across eye movements is location specific and based on retinotopic coordinates

Urgency disrupts cognitive control of human action

Phasic alertness reverses the beneficial effects of accessory stimuli on choice reaction

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