Shocking advantage! Improving digital game performance using non-invasive brain stimulation

Friehs, Maximilian A.; Dechant, Martin; Vedress, Sarah; Frings, Christian; Mandryk, Regan L.

doi:10.1016/j.ijhcs.2020.102582

Cited by 24 publications

(19 citation statements)

References 86 publications

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“…In detail, the benefit for information displayed close to the avatar ego-center across both studies was ∼18 ms and 1.8 error %. As a comparison, a performance increase due to non-invasive brain stimulation in a game-based task may be around 20 ms ( Friehs et al, 2020b ) or 15 ms in a basketball-specific task ( Friehs et al, 2019 ). This can also be seen when effect sizes are taken into account.…”

Section: Discussionmentioning

confidence: 99%

“…This recommendation may also apply to gamified cognitive-psychological tasks that aim to measure human performance, on the condition that the task uses an avatar. For example, ( Friehs et al, 2020a , b ) developed a game-like version of the stop-signal task that utilizes an avatar. Further, increased identification with the avatar increased the performance and training effects of the task ( Friehs et al, 2022 ).…”

Section: Discussionmentioning

confidence: 99%

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The (Gami)fictional Ego-Center: Projecting the Location of the Self Into an Avatar

2022

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A rich body of research suggests that self-associated stimuli are preferentially processed and therefore responses to such stimuli are typically faster and more accurate. In addition, people have an understanding of what they consider their “Self” and where it is located, namely near the head and upper torso—further boosting the processing of self-related stimuli if they are presented near the felt location of the self. We were interested in whether the same mechanism can be found when people transfer their “Self” into a static avatar. We investigated this in two studies with N = 33 and N = 39 young, healthy adults, respectively. Taken together, the results showed that (i) people indeed show enhanced processing for self-avatar-related stimuli and (ii) that self-associations are stronger if the to-be-associated stimuli are closer to the avatar’s upper torso—suggesting some kind of a projected location of the self in the avatar. This implies that attention is not equally distributed across the avatar. Beyond a theoretical level, this also has implications for practical use. For example, digital games opting for a non-traditional user interface where information is displayed on or in the direct vicinity of the character should take this effect into account when choosing which information to present where (i.e., present the most crucial piece of information close to the self-center of the avatar).

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The (Gami)fictional Ego-Center: Projecting the Location of the Self Into an Avatar

2022

Self Cite

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“…Another factor possibly affecting the bias toward the right limb might be stress, which is known to modulate hemispheric asymmetries, as well as cognitive and sport performance [60][61][62][63]. On the other hand, non-invasive brain stimulation has gained increasing popularity as a method to improve cognitive and sport performance [64][65][66][67][68], and one could wonder whether combining brain stimulation and perceptual training might exert even stronger effects in reducing the attentional and perceptual bias toward the right limb observed in sport.…”

Section: Discussionmentioning

confidence: 99%

Hemifield-Specific Rotational Biases during the Observation of Ambiguous Human Silhouettes

et al. 2021

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Both static and dynamic ambiguous stimuli representing human bodies that perform unimanual or unipedal movements are usually interpreted as right-limbed rather than left-limbed, suggesting that human observers attend to the right side of others more than the left one. Moreover, such a bias is stronger when static human silhouettes are presented in the RVF (right visual field) than in the LVF (left visual field), which might represent a particular instance of embodiment. On the other hand, hemispheric-specific rotational biases, combined with the well-known bias to perceive forward-facing figures, could represent a confounding factor when accounting for such findings. Therefore, we investigated whether the lateralized presentation of an ambiguous rotating human body would affect its perceived handedness/footedness (implying a role of motor representations), its perceived spinning direction (implying a role of visual representations), or both. To this aim, we required participants to indicate the perceived spinning direction (which also unveils the perceived handedness/footedness) of ambiguous stimuli depicting humans with an arm or a leg outstretched. Results indicated that the lateralized presentation of the stimuli affected both their perceived limb laterality (a larger number of figures being interpreted as right-limbed in the RVF than in the LVF) and their perceived spinning direction (a larger number of figures being interpreted as spinning clockwise in the LVF than in the RVF). However, the hemifield of presentation showed a larger effect size on the perceived spinning direction than on the perceived limb laterality. Therefore, as we already proposed, the implicit representation of others’ handedness seems to be affected more by visual than by motor processes during the perception of ambiguous human silhouettes.

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“…Nevertheless, future studies should try to replicate and extend our results using a larger sample (for the principle of aggregation see Rushton et al., 1983; but see also Brand et al., 2011). Second, tDCS is not reliable on an individual level and the inter‐individual differences between participants are usually at least moderate in tDCS studies (Friehs et al., 2020; Krause & Cohen Kadosh, 2014). This implies that, while stimulation may have an effect on one individual, another might exhibited the reverse effects or the individual might not be affected at all.…”

Section: Discussionmentioning

confidence: 99%

Transcranial direct current stimulation over the left anterior temporal lobe during memory retrieval differentially affects true and false recognition in the DRM task

Friehs

Greene

Pastötter

2021

Eur J of Neuroscience

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Shocking advantage! Improving digital game performance using non-invasive brain stimulation

Cited by 24 publications

References 86 publications

The (Gami)fictional Ego-Center: Projecting the Location of the Self Into an Avatar

The (Gami)fictional Ego-Center: Projecting the Location of the Self Into an Avatar

Hemifield-Specific Rotational Biases during the Observation of Ambiguous Human Silhouettes

Transcranial direct current stimulation over the left anterior temporal lobe during memory retrieval differentially affects true and false recognition in the DRM task

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