I hope that your work toward the assignment 1 (visual search) is progress well. There are just some questions that were sent to me for the assignment. I think I'll give another notes for the assignments in case that other students might have the same questions as well.
The experiment part
This is where you will set up and collect data. Some of key points that I'd like you to be aware of are:
1. The experiment is for one person at a time. Do not make this into a group as this will not give you a valid data.
2. The task is given out one task at a time. Do not ask the subject to search for all four symbols at the same time. The correct way is to ask the subject to work on one task, collect the data (time on task), then ask the subject to work on another task. When one worksheet is finished (four tasks), move on to another worksheet.
3. The data you collect from the subject is "time on task” or how long does it take a subject to search and finish counting one symbol. The correction rate would be calculated later by yourself.
The data analysis (part of the results part in the report)