Feedback items

Generally you will want to inform participants of how they are doing. This is where the feedback item comes in.

The feedback item provides essentially the same functionality as the sketchpad item. So why not use a sketchpad item? The reason is that a sketchpad item is prepared well in advance, which is why sketchpads can be presented very rapidly. For this reason, if you present feedback using a sketchpad item, the feedback will generally not be up to date. In contrast, feedback items are prepared only when they are presented, which is why they are up to date and suitable for presenting feedback.

The following variables are especially relevant for presenting feedback:

So a typical feedback item would contain something like the following string: 'Your average response time in this block was [avg_rt] ms, and your accuracy was [acc]%'.

For more information, see <http://osdoc.cogsci.nl/usage/giving-feedback-to-participants>.