How to Use:

1. Open a book.
2. In the WordCruncher toolbar, go to Analyze > Book Reports > Vocabulary Dispersion Report.

• Absolute Frequency: The total number of times a word appears in a text.
• Normalized Frequency: An estimate of how many times each word would occur if the book or corpus contained exactly one million words. Normalized frequencies are useful for comparing word frequencies across texts of different sizes.
• Even Dispersion: Imagine a text is divided into five sections of equal size. If a word occurs 100 times in each section, its dispersion is evenly dispersed. From this, you'll know that the word is consistently important throughout the entire text.
• Uneven Dispersion: Imagine a text is divided into five sections of equal size. If a word occurs 500 times in one section, but not at all the other sections, the word is unevenly dispersed: this word is important for only one section of your text.

• Words: The word.
• Freq.: The absolute frequency (within the entire book).
• SectF.: The frequency within the current section.
  If no section is selected, this column will be the same as Freq. column.
• RelF.: Relative (normalized) frequency (counts per million).
• ARF: Average reduced frequency. Combines absolute frequency and dispersion.
• LogF.: Log₁₀ Frequency. A frequency between 0 and 5. This statistic is used to account for low frequency words.
• D: Juilland’s D. A number between 0 and 1, with 0 indicating an uneven dispersion and 1 indicating an even dispersion.
• CV%: The coefficient of deviation by the maximum value of the CV. A percentage with 0 indicating an even dispersion and 1 indicating an uneven dispersion.
• DP: Deviation of proportions. A number between 0 and 1. This column compares actual distribution with expected distribution, with 0 indicating an even dispersion and 1 indicating an uneven dispersion.
• R%: Percent of ranges. The number of sections the word occurs in divided by the total number of sections in a book, with 0 indicating an uneven dispersion and 100 indicating an even dispersion.
• Vocabulary dispersion data: A visual representation of the dispersion of each word. A mark represents a section of the book (by default, 2,000 words per mark), with the color indicating the word’s frequency in that section. The color of the mark indicates whether the word occurs less than expected, more than expected, or more than twice as much as expected.
  If you use the Visualize section dropdown, a lattice will appear in this column header to represent the section.
  Adjust the settings for colors and number of words per mark in user preferences.

• To select a section, click ....
• To reset the calculation boundary, click the arrow icon.

Example:

1. Open the Vocabulary Dispersion Report.
2. Click the Filter drop-down > Frequency.
3. In the filter operation drop-down, select Greater than or equal to.
4. In the Enter filter value(s) box, type 100.
5. Click Add to list.
6. Click OK.
7. Click the DP column header to sort high to low.

Example:

1. Add a View boundary for 2020.
   The entire visualization will now represent 2020.
2. Using the Visualize section drop-down, select May.
   The lattice will now represent May.