Why was the device to track eye movement needed?

C

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

Đáp án là C. để xác minh nơi các sinh viên đang nhìn. Dựa vào ý: In one trial, the students were asked to press the spacebar when they spotted a mushroom, but to ignore any spiders. In a second, the students were asked to press the key when they saw the spider, but to avoid looking at mushrooms.