1. I don't think data collection tools are valid scientific tools. Because the questions from the data collection are too general that can not divide the specific situation for each person. The data collection should put some situation and quetions together and don't ask the stupid questionns.
2. According to my question 1 answer, I think if I take the test another time, the result probably difference. The reason is because our emotion can not the same all the time, different emotion has different result.
3.If the researchers want to know a large group of people happiness. I think they should make a detailed question with different situation. And they should ask for a long time, such as a week probably that can make the data more exact
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