Table 2 The Delta statistics of the model using the ‘emotion’ feature type with the 100 most frequent words. Each group on a row indicates its posts in the training data, while each group on a column denotes its posts in the test data.

From: Leveraging stylometry analysis to identify unique characteristics of peer support user groups in online mental health forums

Training/testing

Senior contributor

Community guide

Community elder

Casual contributor

Contributor

Senior contributor

1.40

1.54

1.56

1.89

1.52

Community guide

1.75

1.23

1.73

2.33

1.90

Community elder

1.71

1.60

1.35

2.03

1.75

Casual contributor

1.82

2.02

1.96

1.44

1.48

Contributor

1.73

1.81

1.73

1.58

1.46

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