Digital Corps

Lostness Index Template

Quick Tip!

Lostness is used to determine how confused and lost a user is on a website or mobile app. The calculated score will be on a scale from 0-1, with the ideal score of 0. Lostness can be calculated by task, participant, or overall.

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The Lostness Index template is a spreadsheet used to easily calculate a lostness score. When using this template, the following values are needed for each user per task:

• N = The number of unique pages/screens visited during the task.
• S = The total number of pages/screens visited during the task.
• R = The minimum number of pages/screens that must be visited to complete a task.

With these values, you will enter the data into the spreadsheet, and it will automatically calculate the Lostness Index for each user and task, along with an overall score.

NOTE: The template contains spaces for five tasks. If your study includes more than five tasks, you will need to create more entries. Pay close attention to copying the formulas.

To get started, download the template below and save a copy on your local machine. Then enter the values specified above to calculate the Lostness Index. After you have calculated the values, upload it to the appropriate project folder on OneDrive.

The Digital Corps Lostness Index Template can be found below.