Final answer:
The primary disadvantage of computer-administered surveys is real-time data capture provides error-prone data, and they require technical skills and have high set-up costs.
Step-by-step explanation:
The primary disadvantage of computer-administered surveys is real-time data capture provides error-prone data. Since the data is entered directly into the computer, interview evaluation time is limited. They also require technical skills and have high set-up costs. Furthermore, computer-administered surveys are slow and may not allow the usage of pictures, videos, or graphics.