Semester 2 Week 13 5/9-5/12

This week, we analyzed the results and made some conclusions. First and foremost, we cannot prove anything due to our statistically insignificant results. However, we can state that our results have a general trend of smartphone usage decreasing both stress and efficiency. A possible reason for smartphones decreasing stress is the fact that, like many addictive processes, rewarding neurotransmitters are released after usage. A possible reason for smartphones decreasing productivity is the fact that an optimal amount of stress and arousal is needed to achieve peak efficiency. Yet, smartphone use may lead to someone having less than peak levels of stress and arousal, thus not performing optimally. We have also found that our study has some sources of error: equipment unreliability, it being a convenience sample (most of the students were boarders- there might be a lurking variable in boarding life or being from a different culture that may have affected the results), and students in the control group oftentimes talking to students around them. It seems that although our data is not statistically significant, our data's trend suggests that students may be better off not using smartphones before doing academic work due to their increased efficiency. Likewise, if students are feeling overwhelmed due to stress, they may benefit from using their smartphones a little bit.

Here are my daily tasks for next week:

    In class, we will write the script and collect documentation for our presentation

    We will rehearse our presentation

    We will conduct more statistical analysis (ex. without outliers)

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Semester 2 Week 12 5/1-5/5

This week, we unfortunately were not able to get much done. On tuesday, I was unable to attend ISR class due to the AP Spanish exam. On thursday's class, we had a guest lecturer come in for a presentation. The presentation took up all of the class time, so I was not able to work much on my project. On friday, we had a scrum for the first time in three or four weeks. Since it was the first scrum in such a long time and since most groups were nearing completion of their projects, the scrum took most of class. As such, we will have to do most of the work planned for this week next week.

Here are my daily tasks for next week:

    In class, we will analyze the results

    We will ask Mr. H for any advice in conducting the statistical analysis.

    We will conduct more statistical analysis (ex. without outliers)

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Semester 2 Week 11 4/24-28

This week, we conducted some statistical analysis of our results. We have found that the average stress level was lower for the experimental group, but the average efficiency (number of questions right per minute) was also lower for the experimental group. However, we found that both the P-values for the stress and efficiency differences was far greater than the 0.05 threshold we set up. As such, our results are not statistically significant (the certainity that our results were not from chance.

Here are my daily tasks for next week:

    In class, we will analyze the results

    We will ask Mr. H for any advice in conducting the statistical analysis.

    We will conduct more statistical analysis (ex. without outliers)

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Semester 2 Week 10 4/17-4/21

This week, we exceeded our goals. We experimented on 12 students this week. So far, we have 60 experiments. This is the required number of experiments, so we are officially done with the experimentation stage of our project. From next week onwards, we will do statistical calculations and analysis of these statistical analysis.

We have been doing convenience samples of mainly people from the dorms. This has reduced the randomness of our experiments but has allowed us to increase the pace of our experimentation to the point that, this week, we have done three weeks worth of experimentation done in one.

Here are my daily tasks for next week:

    In class, we will conduct statistical calculations of the finalized results

    We will ask Mr. H for any advice in conducting the statistical analysis.

    We will analyze the calculations we made.

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Semester 2 Week 9 4/10-4/14

This week, we met our goals. We experimented on 5 students this week. So far, we have 48 experiments (we were supposed to have this number last week, but we are slightly behind schedule). We are about 3 weeks away from getting all 60 students, assuming that we continue experimenting on 5 students per week.


We have been doing convenience samples of mainly people from the dorms. This has reduced the randomness of our experiments but has allowed us to increase the pace of our experimentation. Next week, we intend to create 12 imaginary subjects in order to do statistical calculations.


Here are my daily tasks for next week:

    In class, we will continue practicing statistical analyses of the updated results.

    Conduct 5 experiments

    Update our results

    Create 12 imaginary subjects with random values and then conduct statistical analyses of the total data in order to find the P-values of both the efficiency difference and the mood difference

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Semester 2 Week 8 4/3-4/7

This week, we met our goals. We experimented on 5 students this week. So far, we have 43 experiments (we were supposed to have this number last week, but we are slightly behind schedule). We are about 4 weeks away from getting all 60 students, assuming that we continue experimenting on 5 students per week.

We have been doing convenience samples of mainly people from the dorms. This has reduced the randomness of our experiments but has allowed us to increase the pace of our experimentation. We have also done some statistical calculations with 22 imaginary subjects with generated results (this was when he had only 38 subjects). Our results showed that there was a 40% chance for getting at least the difference for mood we got (as such, not statistically significant) and a 2% chance for getting the difference in efficiency we got (which is statistically significant because it is lower than the threshold probability of 5%).

Here are my daily tasks for next week:

  1. In class, we will continue practicing statistical analyses of the updated results.

  2. Conduct 5 experiments

  3. Update our results

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Semester 2 Week 7 3/27-3/31

This week, we met our goals. We experimented on 5 students this week. We need to get around 5 experiments done a week in order to meet our experimental goal of 60 experiments by the 5th of May. So far, we have 38 experiments (we were supposed to have this number before the end of 3rd quarter, but we are behind schedule).

Doing random experiments have proven to be highly difficult, as not all students show up and time is running our for our project. As such, we are going to have to conduct some convenience samples in order to fill up the necessary 60 experiments needed for drawing conclusions. We will get experiments mainly from people in the dorms, as these students are the most accessible for us.

Here are my daily tasks for next week:

  1. In class, we will continue practicing statistical analyses of the updated results.

  2. Conduct 5 experiments

  3. Update our results

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Semester 2 Week 7 2/21-2/24

This week, we did not get as much done as we had hoped. We only did the experiment on one subject, and our plan was to do the experiment on 7 subjects this week. Likewise, we did not have as many day student subjects due to issues with coordinating the test. Because we have continuously had trouble getting day students to be in our experiment, we unfortunately had to replace them with some convenience-selection subjects who are boarders. Next week, we will have to conduct 11 experiments in order to make up for the experiments we were unable to complete this week.

Here are my daily tasks for next week:

  1. In class, we will continue practicing statistical analyses of the updated results.

  2. Conduct 11 experiments

  3. Update our results

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Semester 2 Week 6 2/14-2/17

This week, we did not get as much done as we had hoped. We only did the experiment on five subjects, and our plan was to do the experiment on 7 subjects this week. Likewise, we did not have as many day student subjects due to issues with coordinating the test. Most of experiments were from boarding students. As such, next week, we will have to conduct 7 experiments in order to make up for the experiments we were unable to complete this week.

Here are my daily tasks for next week:

  1. In class, we will continue practicing statistical analyses of the updated results.

  2. Conduct 7 experiments

  3. Update our results

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Semester 2 Week 5 2/7-2/10

This week, we did not get as much done as we had hoped. We only did the experiment on three subjects, and our plan was to do the experiment on 5 subjects this week. As such, next week, we will have to conduct 7 experiments in order to make up for the experiments we were unable to complete this week.

We got some day students tested this week. I think that I can do around 3 experiments every thursday, at the free period after D period class. I will be doing this every week from now on.

Here are my daily tasks for next week:

  1. In class, we will continue practicing statistical analyses of the updated results.

  2. Conduct 7 experiments

  3. Update our results

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Semester 2 Week 4 1/31-2/3

This week, we did not get as much done as we had hoped. We only did the experiment on one subject, and our plan was to do the experiment on 5 subjects this week. As such, next week, we will have to conduct 9 experiments in order to make up for the experiments we were unable to complete this week.

We will also want to get some more day student subject tested on. They are harder to contact, and it is significantly harder to schedule a time for experimentation with them. As such, we will try to get as many day student subjects tested on as possible starting next week.

Here are my daily tasks for next week:

  1. In class, we will continue practicing statistical analyses of the updated results.

  2. Conduct 9 experiments

  3. Update our results

*Note: This blogpost is a bit outdated as I posted it on monday 3PM. It turns out that my partner did conduct some experiments this week, so we got 5 subjects this week.

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Semester 2 Week 3 1/24-1/27

We went back on task this week. We conducted five experiments this week, and we will continue to have such a vigorous experiment schedule. Such is the only way to ensure that we get our full batch of 60 subjects experimented in a reasonable timeframe. This week, I also learned how to use google spreadsheets and found a shortcut in performing calculations. This will help me save a lot of time once I have a lot of subjects. I also added a new "efficiency" section to our results, as this is what we are finding. To calculate efficiency, we divided the number of questions correct over the number of minutes it took to complete the experiment. Surprisingly, the rankings of our results changed quite a bit after we calculated efficiency.

Here are my daily tasks for next week:

  1. In class, we will continue practicing statistical analyses of the results.

  2. Conduct 5 experiments

  3. Update our results

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Semester 2 Week 2 1/16-1/20

This week went very slow. I missed most of one my classes this week. My laboratory partner is back, but I was not able to do much this week. I taught him some statistics, and I updated him on our project plan. Unfortunately, we did not do much testing. We tried to do some testing over the weekend, but we were unable to do it because we forgot to charge our equipment.

Next week, I will make sure that I get my experiments going.

Here are my daily tasks for next week:

  1. In class, we will practice making statistical analyses of the results.

  2. Begin conducting experiments again

  3. Update our results

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Semester 2 Week 1 1/9-1/12

This week is the first week of the second semester! I missed the first two classes of ISR due to my arriving late to school because I had the flu. In the third class, the class of January 12th, I created an updated S2 Project plan. I removed all the tasks that I no longer have to do, and I updated Asana. Overall, this was a relatively uneventful week. I am not able to do much more because my laboratory partner is not here yet.

Next week, when my lab partner returns, I will get to work on the experiment again.

Here are my daily tasks for next week:

  1. Update my laboratory partner on our plans

  2. Begin conducting experiments again

  3. Continue finding and scheduling appointments with subjects.

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ISR Whitepaper (12/14/16)

Here is my whitepaper in pdf form.
Download file "ISR S1 Whitepaper- Yoo.pdf"

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Weeks 14 and 15 11/22-12/2

These last two weeks were quite different from the other weeks. I conducted the experiment on a few people, including my first subject outside of class. However, I learned that I needed to make a presentation about my project. I chose our presentation's date as December 6th. As such, I spent much of thursday's class preparing for the presentation. Similarly, friday's class was used to make a practice presentation and to evaluate others' practice presentations. After having done a practice presentation, I feel that we understand our project's content very well but lack preparation for tuesday's presentation.

As such, next week, I want to make presentation preparation a priority.

Here are my daily tasks for next week:

  1. By tuesday, I want to have made visual aide for our presentation.

  2. By tuesday, I want to have the script fully memorized. I want to be ready to conduct the presentation on tuesday's study hall with good presentational skills.

  3. By thursday, I want to complete the written portion of the class' final exam.

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Week 13 11/14-18

This week went very well for me. I conducted the experiment on several people, and there are no errors with the EEG technology as of the moment. Furthermore, I learned a few tips on how to use the EEG headsets. However, we were unable to make the announcement this monday either. We also made a new list of students in order to replace the subjects who didn't reply to us by using a random number generator. However, I did not make the assembly announcement yet.

Next week, I want to resume testing. I will also make giving the assembly announcement a priority.

Here are my daily tasks for next week:

  1. On Monday, I will make an assembly announcement

  2. By thursday, I want to have experimented with at least 11 subjects.

  3. By friday, I want to have experimented on 14 subjects.

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Week 12 11/7-11/10

This week was a much better week for me. I conducted the experiment on several people, and there are no errors with the EEG technology as of the moment. I have conducted four experiments this week, so the total number of experiments I have conducted is now 5. However, I did not make the assembly announcement yet.

Next week, I want to resume testing and to begin finding students who were chosen in our random sample but didn't respond and start conducting my experiment on them. I will also make giving the assembly announcement a priority.

Here are my daily tasks for next week:

  1. On Monday, I will make an assembly announcement

  2. By thursday, I want to have experimented with at least 10 subjects.

  3. By friday, I want to have a full list of 60 that is further divided into control and experimental groups, and I want replacements for any subjects in that full list who cannot participate.

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Week 11 10/31-11/4

This week was not a very good week for me. I was unable to make the announcement in assembly on Monday. On Tuesday, I learned that an issue I previously had with the EEG scanner, the stress level not being recorded, is being a hindrance again after not being present for quite some time. I tried re-adjusting it several times, but it did not record the stress level. I tried using some others headsets, but the stress level was still not recorded. I was absent on thursday, so no work was completed then. On friday, I downloaded the application for the EEG scanner on both a windows and on a mac. These did measure the stress level, but neither was able to record the data (I could only see the data on real time). I did not have any success getting it to work even after re-adjusting the scanner. While working on the project on Saturday, however, I discovered a solution after talking with Dao Viet Tung. It turns out that I need to login on an account in order to record the data.

Next week, I want to return to completing the tasks I was supposed to do this week. I will make the announcement in Monday's assembly. Likewise, we will contact subjects we emailed in person in order to get them to stop ignoring me. I will also replace any subjects who say that they cannot participate and run a few more trials of my experiment.

Here are my daily tasks for next week:

  1. On Monday, I will make an assembly announcement

  2. By thursday, I want to finish experimenting with all the subjects who are in our ISR class.

  3. By friday, I want to have a full list of 60 that is further divided into control and experimental groups.

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Week 10 10/24-10/28

This week, I updated my experimental procedures and decided to only conduct two tests: the EEG test and a short math test. I decided to collect three variables: stress from the EEG test, the time it took for the subject to complete the math test, and the percentage of math test questions the subject answered correctly. I also picked subjects to be in the control group among the group I chose, and I contacted all of my subjects. However, response rates were pretty low for subjects. This seems to be a major hurdle in our project, as we cannot commence large-scale experimentation until we have everyone's OKs. Finally, I have ran the experiment with a few subjects on friday.


Next week, I will make sure I make an announcement at assembly to students to get them to contact me if they got our email. Likewise, we will contact subjects we emailed in person in order to get them to stop ignoring me. I will also replace any subjects who say that they cannot participate and run a few more trials of my experiment.


Here are my daily tasks for next week:

  1. At monday, I will make an assembly announcement

  2. By thursday, I want to finish experimenting with all the subjects who are in our ISR class.

  3. By friday, I want to have a full list of 60 that is further divided into control and experimental groups.

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