Participants' Mean Search Behaviours, by Cognitive Complexity Level:

The most queries were submitted by users completing understand tasks, and the fewest by those completing create tasks.

Query lengths were on average longest for evaluate tasks, and shortest for analyse tasks. N.B. one extremely long query was submitted by a user completing an evaluate task.

On average evaluate tasks got the most search engine result page clicks, with understand and analyse tasks getting the least.

On average create tasks got the most search engine result page clicks per query, with understand tasks getting the least.

The most URLs visited, on average, was by users completing evaluate tasks, and the fewest by those completing understand tasks.

The most URLs visited per query, on average, was by users completing create tasks, and the fewest by those completing understand tasks.

The most queries without a result of interest, on average, was by users engaged in understand tasks. The fewest was by users engaged in analyse and create tasks.

Time to task completion was on average longest for evaluate tasks, and shortest for analyse tasks.

The longest time on average spent looking at search engine result pages was for understand tasks. The shortest was analyse and create.