Interval Width Influences

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Interval Width Influences

The variability of the interval width, can also be used to select or suppress certain behavioral codings. All behavior that lasts for less than 50% of the current interval width is suppressed (like in Export data per Code).

Using the same example as before, with additionally a Code 'C' and an interval width = 5, results in the following table (the thin lines still represent the single video frames, whereas the thicker lines represent the new Interval borders):

 

Interval 1

Interval 2

Interval 3

Interval 4

Interval 5

Int. 6

A

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1

1

1

1

1

1

1

1

1

1

1

1

 

 

C

 

 

 

1

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The Code "C" in the first and second interval will be ignored, because this Codes duration covers less than 50% of the interval width. The same happens with Code "B" in the third and sixth interval.
This way, the overlapping of Code 'A' and Code 'B' no longer exists!

For better understanding, the next table shows all codings that are NOT taken into account, because of their length, on a colored back ground:

 

Interval 1

Interval 2

Interval 3

Interval 4

Interval 5

Int. 6

A

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1

1

1

1

1

1

1

1

1

1

1

1

 

 

C

 

 

 

1

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The data used for the Cluster export, looks therefore like this:

 

Interval 1

Interval 2

Interval 3

Interval 4

Interval 5

Int. 6

A

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1

1

1

1

1

1

1

1

1

 

 

 

During the export of the Cluster data, the number of coded Intervals is counted. This results in the following table:

 

Interval 1

Interval 2

Interval 3

Interval 4

Interval 5

Interval 6

A

1

1

1

 

 

 

B

 

 

 

1

1

 

In combination with a Cluster width of 1 (or maximal 2), the results of the Cluster Data Export, in this example, looks like this:

Count

A

B

3

1

0

2

0

1

This means: Code 'A' was coded three times, each time with a length of 5 frames. Code 'B' was coded 2 times, also with a length of 5 frames for each occurrence.

Note: With the help of the Interval width setting and the Cluster size setting, you can easily clean up and compress your data exports. This is a very powerful functionality to reduce 'data noise', which again helps you to get better, more reliable results when processing your data, using e.g. a statistical application like SPSS.