A Study On The Effect Of Visual Display Of Virtual Arms On The Perception Of Egocentric Distance In VR Environment

The perception of egocentric distance is the distance from one's self.It is an important part of visual space perception.The ability to perceive distance plays an important role in the human-computer interaction.There are many differences between the natural environment and the virtual environment.In the virtual environment,various visual cues are generated by computers.Therefore,it is necessary to thoroughly study the special mechanism of virtual visual cues that affect distance perception in the virtual reality environment.The results of this research will be applied to the design of human-computer interaction interface in virtual reality.This study explored the perception of egocentric distance perception based on the effect of virtual arms.This study consists of three parts: Study 1 explored the effect of virtual arm length on egocentric distance,including two experiments: Experiment 1 explored the effect of extended virtual arms on egocentric distance perception;Experiment 2 explored the effect of shortening virtual arms on egocentric distance perception.Study 2 explores the effect of visual cues of virtual arm on the perception of egocentric distance,including three experiments: Experiment 3 explores the effect of different visual cues of virtual arms on the perception of egocentric distance when the length of virtual arm is equal to the length of natural arm;Experiment 4 explores the effect of different visual cues of virtual arm on the perception of egocentric distance when the virtual arm is extended;Experiment 5 explores the effect of different visual cues of virtual arm on the perception of egocentric distance when the virtual arm is shortened.Study 3 explores the effect of action specific of virtual arm on the perception of egocentric distance,including three experiments: Experiment 6 explores the effect of action specific of virtual arm on the perception of egocentric distance when the length of virtual arm is equal to the length of natural arm;Experiment 7 explores the effect of action specific of virtual arms on the perception of egocentric distance when the virtual arm is extended;Experiment 8 explores the effect of action specific of virtual arms on the perception of egocentric distance when the virtual arm is shortened.The experimental results showed that:1)Extending the virtual arm,in the virtual arm range,the perception of egocentric distance is significantly reduced.Shortening the virtual arm,in the virtual arm range,the perception of egocentric distance becomes significantly larger.Whether the virtual arm is extended or shortened,there is no effect on the estimation of the distance outside the virtual arm range.2)When the virtual arm is equal to or longer than the real arm,in the arm range,the estimate of the distance under the incomplete abstract virtual arm condition is significantly larger than under the concrete virtual arm condition;out the arm range,the visual cues of the virtual arm have no effect on distance perception.When the virtual arm is shorter than the real arm,the visual cues of the arm have no effect on distance perception within or outside the range of the arm.3)Outside the arm range,action specific has no significant effect on distance perception.In the arm range,only when the virtual arm is extended,the estimate of distance with action specific is shorter than without action specific.4)When the virtual arm is extended,the perception of egocentric distance is related to the visual cue of the arm and action specific.Extending the virtual arm,the perception of egocentric distance is related to the visual cue of the arm and action specific.5)To shorten the virtual arm,the perception of egocentric distance has nothing to do with the visual cue of the arm and action specific.The results of this study can provide a scientific basis for how to reduce the perceptual bias caused by individuals' behavioral or physical cues in operations tasks(including natural or virtual environments)involving distance perception or deep perception in areas such as aerospace,aviation,and driving.This can improve the operator's ability to perform deep perception judgment and the reliability of safely completing operational tasks.