Investigation of Visual Stimulus Signals Using Hue Change for SSVEP

Sato, Yoshihito; Kitamura, Yuichiro; Hirata, Takamichi; Bao, Yue

doi:10.3390/app11031045

Cited by 6 publications

(2 citation statements)

References 13 publications

(19 reference statements)

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“…, 2021). Similarly, studies have shown that users' visual fatigue can be reduced by changing the frequency of dynamic flickers (Sato et al. , 2021).…”

Section: Related Workmentioning

confidence: 99%

“…This inhibition effect persisted when the visual flicker was task-irrelevant and out of attentional focus, but disappeared when the visual flicker was moved from the central field to the periphery (Yuan et al, 2021). Similarly, studies have shown that users' visual fatigue can be reduced by changing the frequency of dynamic flickers (Sato et al, 2021). A study on spatial navigation found that a single flashing stimulus could improve the user's attention and reduce visual fatigue (Chen et al, 2017).…”

Section: Introductionmentioning

confidence: 98%

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The effects of dynamic prompt and background transparency of hover feedback design on the user interface of shopping websites

Chen

Zhai²

2022

APJML

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PurposeThe implementation of interaction design concepts to facilitate communication between users and shopping websites has gained increasing attention in recent years. Mouse hover is a vital interaction method for users to access shopping sites and significantly impacts their decision-making experience. A well-designed mouse hover function can effectively enhance the user's search performance and improve the user experience. The purpose of this study is to investigate whether the dynamic prompt designs at the hover position and the degree of feedback transparency may affect the user's task performance and personal feelings when operating the hover function on the shopping website.Design/methodology/approachThe study employed two independent variables in the experiments: dynamic prompt and background transparency of hover feedback. A between-subject design of 2 (single flicker and continuous flicker) × 3 (transparency at 0%, 25%, and 50%) was adopted in the experiment. A total of 60 participants were invited to participate in the experiment using the purposive sampling method. Participants were asked to complete four operation tasks, and the time of each was recorded. They were then asked to complete the system usability scale (SUS) questionnaire and conduct subjective evaluations before they were briefly interviewed.FindingsThe generated results revealed that: (1) In the interaction with a shopping website, the degree of background transparency of hover feedback affected the participants' task performance. (2) The effect of a single flicker had significantly higher subjective evaluation results regarding the degree of rationality compared with a continuous flicker. (3) The participants' perceptions of the information clarity were affected when the background transparency of hover feedback was 50%. (4) The effect of a continuous flicker was better than that of a single flicker when the background transparency of hover feedback was 25%. The participants' attraction to a continuous flicker was significantly higher than that of a single flicker. Nonetheless, when the degree of background transparency was at 0% or 50%, the results were the opposite.Originality/valueThe findings generated from the research can be a reference for the development of hover operation in the user interface design for shopping websites.

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“…, 2021). Similarly, studies have shown that users' visual fatigue can be reduced by changing the frequency of dynamic flickers (Sato et al. , 2021).…”

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

The effects of dynamic prompt and background transparency of hover feedback design on the user interface of shopping websites

Chen

Zhai²

2022

APJML

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Bichromatic visual stimulus with subharmonic response to achieve a high-accuracy SSVEP BCI system with low eye irritation

Vahid

Behboodi

Mahnam

2023

Biomedical Signal Processing and Control

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Brain stimulation with 40 Hz heterochromatic flicker extended beyond red, green, and blue

Henney,

Carstensen,

Thorning-Schmidt

et al. 2024

Sci Rep

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Alzheimer’s disease (AD) is associated with electrophysiological changes in the brain. Pre-clinical and early clinical trials have shown promising results for the possible therapy of AD with 40 Hz neurostimulation. The most notable findings used stroboscopic flicker, but this technique poses an inherent barrier for human applications due to its visible flickering and resulting high level of perceived discomfort. Therefore, alternative options should be investigated for entraining 40 Hz brain activity with light sources that appear less flickering. Previously, chromatic flicker based on red, green, and blue (RGB) have been studied in the context of brain-computer interfaces, but this is an incomplete representation of the colours in the visual spectrum. This study introduces a new kind of heterochromatic flicker based on spectral combinations of blue, cyan, green, lime, amber, and red (BCGLAR). These combinations are investigated by the steady-state visually evoked potential (SSVEP) response from the flicker with an aim of optimising the choice of 40 Hz light stimulation with spectrally similar colour combinations in BCGLAR space. Thirty healthy young volunteers were stimulated with heterochromatic flicker in an electroencephalography experiment with randomised complete block design. Responses were quantified as the 40 Hz signal-to-noise ratio and analysed using mixed linear models. The size of the SSVEP response to heterochromatic flicker is dependent on colour combinations and influenced by both visual and non-visual effects. The amber-red flicker combination evoked the highest SSVEP, and combinations that included blue and/or red consistently evoked higher SSVEP than combinations only with mid-spectrum colours. Including a colour from either extreme of the visual spectrum (blue and/or red) in at least one of the dyadic phases appears to be more important than choosing pairs of colours that are far from each other on the visual spectrum. Spectrally adjacent colour pairs appear less flickering to the perceiver, and thus the results motivate investigations into the limits for how alike the two phases can be and still evoke a 40 Hz response. Specifically, combining a colour on either extreme of the visual spectrum with another proximal colour might provide the best trade-off between flickering sensation and SSVEP magnitude.

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Investigation of Visual Stimulus Signals Using Hue Change for SSVEP

Cited by 6 publications

References 13 publications

The effects of dynamic prompt and background transparency of hover feedback design on the user interface of shopping websites

The effects of dynamic prompt and background transparency of hover feedback design on the user interface of shopping websites

Bichromatic visual stimulus with subharmonic response to achieve a high-accuracy SSVEP BCI system with low eye irritation

Brain stimulation with 40 Hz heterochromatic flicker extended beyond red, green, and blue

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