## 2 Methods
### Research Characteristics and Research Procedure
First, CAWI allows for a wide geographic and demographic reach, enabling access to a large pool of respondents from diverse and dispersed locations--something that is often difficult to achieve through traditional methods such as in-person or telephone interviews. Second, the method is highly cost-effective, as it eliminates expenses related to the physical presence of interviewers, travel, and manual data entry. The electronic nature of CAWI also reduces data processing costs [55; 56; 57; 58]. Another advantage is the homogeneity and consistency of data. Online surveys ensure that all participants receive identical questions in the same sequence, minimizing the risk of variability caused by interviewer bias in phrasing or instructions. Additionally, CAWI facilitates real-time data collection and processing, allowing for immediate analysis and quicker decision-making without the delays associated with traditional paper-based surveys [55; 56; 57; 58]. \begin{table}
\begin{tabular}{c c} \hline
**Factor** & **Factor Description** \\ (**Car Feature**) & \\ \hline F1 & Battery capacity in kWh (for electric vehicle) and real range in various conditions \\ F2 & Cylinder configuration (e.g., R4, V6) and number of valves per cylinder \\ F3 & Type of charging (turbocharging, compressor) \\ F4 & Acceleration time from 0 to 100 km/h \\ F5 & Type of recommended fuel (95, 98, diesel) \\ F6 & Engine displacement (cm\({}^{3}\)) \\ F7 & Fuel consumption in urban, extra-urban, and mixed cycles \\ F8 & Braking time from 100 to 0 km/h \\ F9 & Brand and model of audio system, number of speakers, availability of subwoofer \\ F10 & Touch screen resolution and size, availability of gesture control functions \\ F11 & Wheelbase, ground clearance, front/rear track width \\ F12 & Presence of advanced safety systems (e.g., types of driving assistance available) \\ F13 & Type and range of seat adjustments (e.g., 14-way driver’s seat adjustment with massage function) \\ F14 & Air conditioning (e.g., four-zone automatic air conditioning with individual settings for each passenger) \\ F15 & Availability and type of communication ports (USB, USB-C, AUX, HDMI) \\ F16 & Compatibility with a smartphone (compatible with various versions of Android/iOS) \\ F17 & Availability of advanced assistance packages (e.g., autonomous driving packages) \\ F18 & Types of charging connectors (e.g., CCS, CHAdeMO, Type 2) \\ F19 & Maximum power assumed for AC/DC charging \\ F20 & Full charging time from a 230 V socket \\ F21 & Thee dimensions \\ F22 & Description of the vehicle personalization functions for the user (e.g., selection of driving mode, \\ F22 & personalization of interior lighting) \\ F23 & Length of the standard warranty period and warranty period for key components (e.g., EV battery) \\ F24 & Estimated cost of servicing at specific intervals (e.g., inspection every 15,000 km) \\ \hline \end{tabular}
\end{table} 
Table 2: List of factors characterizing vehicles included in the analysis. The method also supports tracking survey progress in real-time, providing researchers with instant updates on response rates and allowing them to monitor demographic participation or address potential issues during the study. This level of oversight ensures the efficient management of data collection [55; 56; 57; 58]. CAWI is particularly effective in engaging specific demographic groups, such as younger generations, who are more inclined to participate in digital surveys compared to conventional methods. This makes CAWI especially valuable for research into modern topics like car-sharing services that are closely tied to digital technologies and consumer trends. Furthermore, the online nature of CAWI increases accessibility, allowing respondents to participate using various devices, including smartphones, tablets, or computers, making it easier to reach a diverse audience [55; 56; 57; 58]. Additionally, the method offers environmental benefits by eliminating the need for printed surveys, reducing paper waste, and contributing to more sustainable research practices.