Confusion

One of the types of objects in Praat.

An object of type Confusions represents a confusion matrix, with stimuli as row labels and responses as column labels. The entry at position [i] [j] represents the number of times response j was given to the stimulus i.

Creating a Confusion from data in a text file

Suppose you have two objects A and B. In one way or another, you have acquired the following confusions: δAA = 6, δAB = 2 , δBA = 1, and δBB = 7.

You can create a simple text file like the following:

    "ooTextFile" ! to make Praat recognize your file
     "Confusion" ! The line that tells Praat about the contents
     2 "A" "B" ! Number of columns, and column labels
     2 ! Number of rows
     "A" 6 2 ! Row label A, A-A value, A-B value
     "B" 1 7 ! Row label B, B-A value, B-B value

This text file can be read with the Read from file... command.

Commands

Creation:

Drawing

Query

Modification

Grouping

Analysis:

Inside a Confusion

With Inspect you will see the following attributes:

numberOfRows
the number of stimuli.
numberOfColumns
the number of responses.
rowLabels
the names of the stimuli.
columnLabels
the names of the responses.

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© djmw, May 17, 2011