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Table 1 Accuracy and efficiency of task performance

From: Evaluating text visualization for authorship analysis

Pt. Task (related function of the portal) A(V) A(~V) DiffA p-valueA E(V) E(~V) DiffE p-valueE
1a Counting category-specific words (feature highlighting) 0.83 0.77 0.06 0.4367 1.45 4.45 −3.00 0.0020 **
1b Relating category-specific words (feature highlighting) 0.46 0.47 −0.01 0.9286 1.90 2.74 −0.84 0.0084 **
2a Comparing authors’ use of category-specific features (spider chart) 0.90 0.48 0.42 0.0007 ** 1.81 4.61 −2.80 0.0000 **
2b Comparing authors’ use of sub-category-specific features (spider chart) 0.94 0.68 0.26 0.0090 ** 1.55 2.81 −1.26 0.0001 **
2c Comparing similarity of authors’ writing profiles (spider chart) 1.00 0.81 0.19 0.0118 ** 2.00 3.16 −1.16 0.0061 **
3a Identifying authors’ usage of category-specific features (stylometric heatmap) 0.94 0.32 0.62 0.0000 ** 1.52 4.03 −2.51 0.0000 **
3b Identifying authors’ usage of sub-category-specific features (stylometric heatmap) 0.90 0.19 0.71 0.0000 ** 1.32 4.42 −3.1 0.0075 **
  1. Note:
  2. A(V) = Mean accuracy of task performance using visualization.
  3. A(~V) = Mean accuracy of task performance without using visualization.
  4. DiffA = Mean difference of A(V) – A(~V).
  5. E(V) = Mean efficiency of task performance using visualization (in minutes).
  6. E(~V) = Mean efficiency of task performance without using visualization (in minutes).
  7. DiffE = Mean difference of E(V) – E(~V) (in minutes).
  8. **p < 0.01.