Calculate Event-based Statistics

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Calculate Event-based Statistics

Based on the values covered by your coded Events, DataView can calculate the following statistics per Event, for any of your channels:

oSum

oMean

oStandard Deviation

oVariance

The computed values are entered as Codes in new, automatically created Events.

Perform Calculations

Independent of how the Event information was created (based on observations within INTERACT or automatically created from within DataView - based on measured values), DataView offers a script that groups all values per Event and performs the calculations mentioned. The results are written into new INTERACT Events as well as into the raw Data.

Make sure INTERACT is running on the same computer as your copy of DataView is.

If you want to add the resulting Events into an existing document:

Make sure you have opened the correct INTERACT file.

Switch back to DataView.

Select Scripting - Data Processing > Compute statistical values based on Event Codes from the DataView window.

The following dialog appears:

Btn_ConsolidateEvents.png

Computation options

All calculations are performed on the number of lines for which a gap-less range of Codes exists, like grouped within the green borders:

Btn_ConsolidateEvents.png

oSum - Summarizes all values per grouping of the selected Code.

oMean - Computes the average per grouping of the selected Code by dividing the summary by the number of lines.

oVariance - Computes the variance of the values per grouping of the selected Code

oStandard Deviation - Computes the uncorrected empirical standard deviation per grouping of the selected Code

Chanel Selection

This area allows you to select the channels for which you want to calculate specific values.

Use CTRL + SHIFT for selecting multiple channels.

Class and Code Selection

This area lists all Codes and Classes available in the raw data table of your sensor data.

Note: You can create those entries either values-based, with the help of the script described in Create INTERACT Events, or based on your video observations from within INTERACT, using the command Copy Codes to DataView.

Extend Raw Data

Per default, the computed results are just entered into the INTERACT Events. If you want to add those results into your raw data as well:

oSelect the option Add computed values to raw data and the bottom of the dialog.

Now all computed values will be added in additional columns of your raw data for all lines that belong to an Event.

Results in INTERACT

The routine creates new Events that cover the exact time frame as your behavioral Events and hold all calculations you selected as Codes:

Btn_ConsolidateEvents.png

Sorting this data by time, shows that you end up with multiple Event lines that cover the exact same time frame:

Btn_ConsolidateEvents.png

Once you are finished with your computations, you can easily consolidate all entries - merging all Events with identical time information:

Select Transform - Events - Consolidate Events Btn_ConsolidateEvents.png to consolidate the available information to a more compact view:

Btn_ConsolidateEvents.png

Now each Event holds its corresponding values.