Congruency of gaze metrics in action, imagery and action observation

Causer, Joe; McCormick, Sheree A.; Holmes, Paul S.

doi:10.3389/fnhum.2013.00604

Cited by 25 publications

(20 citation statements)

References 69 publications

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“…Vision is the dominant sensory system supporting human function, especially in psychomotor tasks, as it is vital to identify the action's target and provides feedback to enable corrections [20]. In fact, gaze metrics represent one of the most valid, reliable, and objective indices to assess operator performance [21][22][23], including physicians [24,25].…”

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confidence: 99%

Gaze entropy reflects surgical task load

et al. 2016

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confidence: 99%

Gaze entropy reflects surgical task load

et al. 2016

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“…That is, when the current goal is simply to view the objects, we will most likely fixate at the center of mass. However, when we intend to reach and grasp for a certain object of interest, we will tend to fixate at the future grasp contact points ( Brouwer et al, 2009 ; see also Land and Hayhoe, 2001 , for an elegant experimental investigation of eye-movements distribution during everyday activities, and Causer et al, 2013 , for a review).…”

Section: Discussionmentioning

confidence: 99%

The hand grasps the center, while the eyes saccade to the top of novel objects

et al. 2015

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In the present study, we investigated whether indenting the sides of novel objects (e.g., product packaging) would influence where people grasp, and hence focus their gaze, under the assumption that gaze precedes grasping. In Experiment 1, the participants grasped a selection of custom-made objects designed to resemble typical packaging forms with an indentation in the upper, middle, or lower part. In Experiment 2, eye movements were recorded while the participants viewed differently-sized (small, medium, and large) objects with the same three indentation positions tested in Experiment 1, together with a control object lacking any indentation. The results revealed that irrespective of the location of the indentation, the participants tended to grasp the mid-region of the object, with their index finger always positioned slightly above its midpoint. Importantly, the first visual fixation tended to fall in the cap region of the novel object. The participants also fixated for longer in this region. Furthermore, participants saccaded more often, as well saccading more rapidly when directing their gaze to the upper region of the objects that they were required to inspect visually. Taken together, these results therefore suggest that different spatial locations on target objects are of interest to our eyes and hands.

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“…that these processes have a partially shared neural network [15]. From a rehabilitation standpoint, some studies have demonstrated strong evidence that action observation has a positive effect on rehabilitation of motor deficits after stroke [16 -18].…”

Section: Eye Gaze Correlates Of Motor Impairment In Vr Observation Ofmentioning

confidence: 99%

Eye Gaze Correlates of Motor Impairment in VR Observation of Motor Actions

Alves

Vourvopoulos²,

Bernardino³

et al. 2016

Methods Inf Med

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Summary Introduction: This article is part of the Focus Theme of Methods of Information in Medicine on “Methodologies, Models and Algorithms for Patients Rehabilitation”. Objective: Identify eye gaze correlates of motor impairment in a virtual reality motor observation task in a study with healthy participants and stroke patients. Methods: Participants consisted of a group of healthy subjects (N = 20) and a group of stroke survivors (N = 10). Both groups were required to observe a simple reach-and-grab and place-and-release task in a virtual environment. Additionally, healthy subjects were required to observe the task in a normal condition and a constrained movement condition. Eye movements were recorded during the observation task for later analysis. Results: For healthy participants, results showed differences in gaze metrics when comparing the normal and arm-constrained conditions. Differences in gaze metrics were also found when comparing dominant and non-dominant arm for saccades and smooth pursuit events. For stroke patients, results showed longer smooth pursuit segments in action observation when observing the paretic arm, thus providing evidence that the affected circuitry may be activated for eye gaze control during observation of the simulated motor action. Conclusions: This study suggests that neural motor circuits are involved, at multiple levels, in observation of motor actions displayed in a virtual reality environment. Thus, eye tracking combined with action observation tasks in a virtual reality display can be used to monitor motor deficits derived from stroke, and consequently can also be used for re -habilitation of stroke patients.

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Congruency of gaze metrics in action, imagery and action observation

Cited by 25 publications

References 69 publications

Gaze entropy reflects surgical task load

Gaze entropy reflects surgical task load

The hand grasps the center, while the eyes saccade to the top of novel objects

Eye Gaze Correlates of Motor Impairment in VR Observation of Motor Actions

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