Which pair of factors are key for user acceptance of biometric identification systems?

The pair of factors that are key for user acceptance of biometric identification systems includes the throughput rate and the time required to enroll. Throughput rate refers to how quickly the system can process users for identification, which is crucial for environments where speed and efficiency are important, such as airports or secure facilities. If a biometric system has a high throughput rate, users are likely to appreciate the convenience of rapid identification, leading to greater acceptance.

The enrollment time is equally important; if the process to enroll users into the biometric system is lengthy or complicated, prospective users may be discouraged from utilizing the system. A streamlined and efficient enrollment process enhances user experience and leads to higher acceptance rates of biometric systems.

In contrast, while cost and user training can impact the overall implementation of such systems, they are not as directly tied to immediate user acceptance as throughput and enrollment time. Similarly, user awareness and privacy concerns are critical issues, but they pertain more to the larger acceptance of technology rather than immediate usability factors. Accuracy and technology visibility matter for trust but do not directly influence the first-hand experience of utilizing biometric systems. Therefore, the emphasis on throughput rate and enrollment time makes the correct answer a strong determinant of user acceptance.