This Treejack tree test study was launched on Dec 22 2010 and is still active.
The latest response was received on Mar 17 2015.
107 completed and 24 abandoned.
131 people have participated and 107 (81%) of those people completed all 10 tasks.
The success score is the percentage of people who selected a correct item as the answer to the task.
The error bars on the success score are calculated with a 95% confidence interval using the Adjusted Wald method.
Directness is the percentage of participants who didn't backtrack up the tree at any point during the task. The higher this score is, the more confident you can be that your participants were sure of their answers.
If you have a low success score but a high directness score, there's a good chance that your participants thought the answer was somewhere you didn't.
The error bars on the directness score are calculated with a 95% confidence interval using the Adjusted Wald method.
This box plot illustrates the time taken for participants to complete your tasks.
Outliers greater than four standard deviations from the mean have been removed for the purposes of these calculations. All times are listed in minutes.
The overall score is a weighted average of the squares of success and directness which favors success over directness at a ratio of 3:1, and scaled to be a value out of 10.