Welcome

Caffeine is the most widely taken drug in the world. Something like 85% of the population of Europe and the USA take it on a regular basis, most often in the form of coffee or tea.

Caffeine acts as a stimulant and has a number of effects on the body. In this experiment we're interested in how people's general level of caffeine consumption affects their mental performance.

The experiment involves completing a few simple tasks that assess memory and attention. This should take about ten minutes. Then we need to know how much caffeine you normally consume, and a bit about you, as a number of other factors (for instance whether you smoke, drink or exercise) can affect your performance. Even if you don't normally consume any caffeine, we'd be very grateful if you took part - we need data from people who don't drink coffee or tea as well as those who do.

All in all, completing the web site should take about 15-20 minutes. All of the responses you make are completely anonymous, so you needn't worry about anybody getting hold of any personal information. We will not be able to give you feedback on your test scores.

If you want to take part click on the button below, and thanks in advance. Note that you will need to use a Java-enabled browser to take part, and that the next page may take a short time to load.

The Big Tea and Coffee Experiment has been reviewed and passed by the Northumbria University Division of Psychology Ethics Committee. No individually identifiable data will be collected while completing the web page. The project is based at the Human Cognitive Neuroscience Unit. If you have any questions or comments, please send them to the HCNU.