Visual Intervention Design For Preventing Falls In Older Adults Based On Risk Perception

In the aging society,falling is an important health problem that endangers the health of the older adults.In order to explore more rich and effective way of fall prevention intervention in the older adults,this research from the perspective of risk perception,study the older adults in a different environment to fall risk awareness,and then from two aspects of visual cues and fall environment to carry on the design and optimization,provides a visual means of intervention to prevent the older adults fall intervention principles to the environment.The study consists of three parts.First of all,based on literature research,the literature review and discussion,has been clear about the current limitation of the elderly fall intervention design,namely the lack of active friendly used to influence the elderly fall risk perception of effective interventions,and fall risk perception as the core,to explore the elderly fall risk theory and its intervention in the design,set up the analysis framework of this study,The stylization and optical flow visual intervention Angle of the study are also proposed.Then,as the main body of the study,a two-stage experiment was designed and executed.Finally,according to the analysis results the design suggestions are drawn.Experiment 1 studied the impact of warning logo design on fall risk perception,that is,how different styles of visual fall intervention affect subjective risk perception and EEG emotional arousal related to risk perception in the elderly in the home environment.Based on the previous phase of the research results,the experiment based on virtual reality environment,2 selection scale more specific high-risk fall scenes-slope scene,set different slope(-20 degrees,5-10 degrees,0,10,20 degrees),to explore the visual cues in the environment light flow design and environmental geometric parameters for the elderly fall risk perception and objective balance ability.A total of 59 older adults and 30 younger adults were recruited to participate in the laboratory experiment.Through the analysis of the data collected from the experimental test,the research mainly draws the following conclusions:(1)The types of natural visual cues should be considered as one of the elements of fall intervention design for the older adults.Specifically,the study compared the effects of three types of visual cues(cuteness,cuteness,and vigilance)on subjective risk perception and objective emotional arousal.The results of eeg showed that the N300 amplitude was the most negative in the alert state,and was significantly higher than that in the interest and cuteness intervention.Therefore,compared with cuteness intervention(cuteness and cuteness),alert intervention design can be considered as a design method to improve the risk perception of the older adults.(2)At the personal trait level,when facing the risk of falling,the older adults with low perceptual sensitivity had a lower subjective risk perception than the older adults with high perceptual sensitivity(ABC scale score 89.937 is the boundary).Therefore,in terms of the intervention population,the intervention of falls in the older adults with low perceptual sensitivity should be given priority in the context of limited resources.(3)In the VR environment,the type of self-heuristic optical flow cues did not affect the risk judgment or posture sway of the elderly subjects,while the global optical flow cues induced a greater fall risk perception in the young.Meanwhile,in virtual reality environment,compared with 0 degree,20 degree and-20 degree,10 degree(±10 degree)can be used as the balance safety critical value of slope design.The conclusions of this study are helpful to provide referential design experience and more ideas for optimal intervention design for falls of the older adults in the future renovation of the environment suitable for aging.