Commit e5914548 authored by burcharr's avatar burcharr 💬
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...@@ -99,30 +99,31 @@ The mean diagonal value of the confusion matrix upholds almost the same ordering ...@@ -99,30 +99,31 @@ The mean diagonal value of the confusion matrix upholds almost the same ordering
## Practical Evaluation ## Practical Evaluation
### Scenario 1: One day of evaluation ### Scenario 1: One day of evaluation
In the first scenario, the X (TODO) subjects reported an average of .. hand washing procedures on the day on which they evaluated the system. In the first scenario, the 5 (TODO) subjects reported an average of $4.75$ hand washing procedures on the day on which they evaluated the system.
Per subject, there were (+- ) hand washing procedures. Out of those, .. (+-) were correctly identified ($xy\,\%$). Per subject, there were $4.75$ ($\pm 3.3$) hand washing procedures. Out of those, $1.75$ ($\pm 2.06\,\%$) were correctly identified. The accuracy per subject was $28,33\,\%$ ($\pm 37.9\,\%$). The highest accuracy for a subject was $80\,\%$ out of 5 hand washes, the lowest was $0\,\%$ out of 4 hand washes.
The duration and intensity of the hand washing process also played a role, as can be seen in todo fig. Some subjects wore the smart watch on the left wrist instead of the right wrist, and reported worse results for that.
The highest accuracy was achieved for ....
The lowest accuracy was achieved for ....
The correlation of duration of the hand washing with the detection rate is ... The duration and intensity of the hand washing process also played a role.
Likewise, the correlation of the intensity of washing with the detection rate is ... TODO The correlation of duration of the hand washing with the detection rate is $-0.039$. However, the raw data does only contain 2 "longer" hand washes over 30 seconds, the rest being in the range of 10 to 25 seconds.
Added to that, the correlation of the intensity of washing with the detection rate is $0.267$.
For the reported false positives, the subjects experiences varied. The subjects reported xy (+-) false hand washing detections on this day. Assuming a 12h recording period, that means there are xy / 12 false detections per hour. For the reported false positives, the subjects experiences varied. The subjects reported $4$ ($\pm 5.19$) false hand washing detections on this day. The minimum was 0 false positives, and the highest was 13 false positives.
The activities leading to false positives include: The activities leading to false positives include:
- Changing clothes (or helping others to do so) - Changing clothes (or helping others to do so)
- Washing pans / doing the dishes - Washing pans / doing the dishes
- Scratching oneself - Scratching oneself
- - Brushing teeth
- TODO - Cleaning
The full list of reported activities can be found in the appendix. TODO The full list of reported activities can be found in the appendix.
Some subjects also reported difficulties with the smart watch application (not part of this work), which lead to the model not being run at all sometimes, which might also have influenced the results. It could be possible, that for some hand washing procedures, the smart watch application was not executed, which would lead the user to note down a false negative, also decreasing the sensitivity in the results.
### Scenario 2: Controlled intensive hand washing ### Scenario 2: Controlled intensive hand washing
In scenario 2, the subject each washed their hands at least 3 times. Some subjects voluntarily agreed to performing more repetitions, which leads to more than 3 washing detection results per subject. The detection accuracy per subject was xy (+-) $\,%$, with the highest being, xy and the lowest being zy.TODO. In scenario 2, the subjects each washed their hands at least 3 times. Some subjects voluntarily agreed to perform more repetitions, which leads to more than 3 washing detection results per subject. The detection accuracy per subject was $76\,\%$ ($\pm 25\,\%$), with the highest being, $100\,\%$ and the lowest being $50\,\%$.
The total mean accuracy over all repetitions was xy %. The mean accuracy over all repetitions and not split by subjects was $73,7\,\%$. For scenario 2, one user moved the smart watch from the left wrist to the right wrist after two repetitions. The first two repetitions were not detected, while the two repetitions with the smart watch worn on the right wrist were detected correctly.
...@@ -3,6 +3,7 @@ ...@@ -3,6 +3,7 @@
{} & \textbf{{frequency}} \\ {} & \textbf{{frequency}} \\
\textbf{activity } & \\ \textbf{activity } & \\
\midrule \midrule
\textbf{Abwaschen / Kochen } & 1 \\
\textbf{Aus dem Auto ausgestiegen und ca 5m gelaufen} & 1 \\ \textbf{Aus dem Auto ausgestiegen und ca 5m gelaufen} & 1 \\
\textbf{Dinge einsammeln und wegräumen } & 1 \\ \textbf{Dinge einsammeln und wegräumen } & 1 \\
\textbf{Fleischkäse zum Schneiden auf Brett gelegt } & 1 \\ \textbf{Fleischkäse zum Schneiden auf Brett gelegt } & 1 \\
...@@ -10,10 +11,13 @@ ...@@ -10,10 +11,13 @@
\textbf{Kind Jacke anziehen } & 1 \\ \textbf{Kind Jacke anziehen } & 1 \\
\textbf{Kind umziehen } & 2 \\ \textbf{Kind umziehen } & 2 \\
\textbf{Küche putzen } & 1 \\ \textbf{Küche putzen } & 1 \\
\textbf{Laufen } & 1 \\
\textbf{Pfanne abwaschen } & 1 \\ \textbf{Pfanne abwaschen } & 1 \\
\textbf{Schreiben } & 1 \\
\textbf{Schuhe anziehen } & 1 \\ \textbf{Schuhe anziehen } & 1 \\
\textbf{Tisch abwischen } & 1 \\ \textbf{Tisch abwischen } & 1 \\
\textbf{Windel wechseln } & 2 \\ \textbf{Windel wechseln } & 2 \\
\textbf{Zähne putzen } & 1 \\
\textbf{abwaschen } & 1 \\ \textbf{abwaschen } & 1 \\
\textbf{gekratzt } & 1 \\ \textbf{gekratzt } & 1 \\
\textbf{kochen } & 1 \\ \textbf{kochen } & 1 \\
......
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