USABILITY EVALUATION OF NEW KANSEI INTERFACE FEATURE VERSUS. EXISTING INTERFACE FEATURE IN AUTOMOTIVE NAVIGATION SYSTEM

Author: Alwis N, Muhammad Syafiq Syed Mohamed and Shamsul BMT

Abstract: This study aims to evaluate the usability of new Kansei navigation system interface features versus. existing interface design features in automotive navigation system. The Study population consist of participants which are chosen using purposive sampling technique consist of male professional drivers (PD) and non-professional drivers (NPD) of a local University in Malaysia. A total of 60 participant ranging from 18 – 39 years old participated in this study. Participants were tested using a customized driving simulator which participant will drive according to the route shown by the GPS navigation system( GPS system based on Kansei versus existing system) drivers were tested in terms of their 1) completion time for each task given 2) the number of error produce from each task 3) the satisfaction level from each feature in the GPS system using System Usability Scale (SUS) 4) a kansei survey to measure participant understanding and perception towards usability of GPS interface designs. A Counterbalance method was used in order to eliminate order biased participant. A total of 10 minutes was taken to complete the overall task. Wilcoxon Sign Test was used to compare all objectives except for satisfaction level for NPD and Kansei survey for PD.The Result for driving completion time for both PD and NPD, shows that Kansei GPS system (PD, mean = 2.49±0.66 min, NPD, mean = 2.18±0.71 min) had significantly shorter completion time (p=0.013) compared to the existing system (PD, mean = 2.75±0.66 min, NPD, mean = 2.44±0.74 min). For the number of errors, Kansei GPS system showed a significantly lowered driving error (p <0.05) (PD, mean = 8.86±6.55, NPD, mean = 7.23±6.03) compared to existing GPS System (PD, mean = 13.7±7.94 NPD, mean =10.6±7.6). For the satisfaction level showed no significant different in satisfaction for Kansei GPS System both (PD, mean score = 61.7±19.4 NPD, mean score = 66.58±21.9) compared to existing GPS (PD, mean score = 66.58±21.9 NPD, mean score = 63.58±20.9) (p>0.05). In term of Kansei Survey, shows that there is a significantly higher scoring for Kansei GPS system for both (PD, mean score = 3.6±0.99 and NPD, mean score = 3.69±1.44) compared with existing (PD, mean score =3.15±0.88 NPD, mean score = 2.68±0.18) (p<0.05). The conclusion of the was the new Kansei GPS system performed better in reducing the task completion time, reducing the numbers of driving error and easily distinguish features compared to existing GPS system. However, both professional and non-professional were satisfied using Kansei and existing GPS system.

Keywords: Kansei, GPS, Simulator, Error, Completion time, Drivers, SUS

 

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