Here are the results from the 2/13 test. The False positives and false negatives on the foam trial are probably due to difference in set up between the 2 experiments. Note that there is some debate about the number of misses in the foam trail — it might be twelve. Also the extra hit represents a button press of less than 1 second, which is probably switch bounce — Ted’s code filters such quick double hits as noise.
From the data recorded by the puck, we took out the heatbeat data and the puck released data. Using just the presses, we subtracted the time recorded from the next data point to get the differences between presses. Between trials, we pushed the puck repeatedly to signal between trials. Then the puck was pushed once more to signal the start of the trial. Approximately 30 seconds later, the trials began. There is some discrepancy between the times recorded by the person and the times recorded in the mote data set. It seems that we recorded data points for a longer period of time than the mote recorded.
http://spreadsheets.google.com/ccc?key=0AkDR_-NeZVpydDAwWmx2eFlpN1lkX3ZoWDlMdTJMd0E&hl=en
Trial 2: Compares our data with puck data
http://spreadsheets.google.com/ccc?key=0Ajml4qs0jKAXdGxvR090OVFWalY3WGs0c3M5X3F1SHc&hl=en
- Deepti & Arunan
I tried to line up the hits for the foam trial and got only 11 misses. There were a number of presses that happened after the fact. Also, I’m suspicious that the start times of the paper recording and the mote recordings don’t line up. Can you please post what you recorded on paper so we can see the details? It would be nice to have a little more explanation about how you found the start and end of the data sets, because we may have an issue there.
Comment by gthomas — February 21, 2010 @ 11:43 am