Done! Thanks!

Any comments for us? (Was it fun? Any technical difficulties?)

We're interested in how your date of birth affects how quickly you process words. So if you don't mind, please enter your birthdate:

Thanks for doing the HIT!

Saving . . .
Trial 1 of 38
Press 's' to start the next trial

In this HIT, you will see words flashed up on the screen. You'll have to type the number that goes with each word as quickly as possible, and then hit the enter key to submit your answer.

For example, if you see January, you will need to type 1 and press enter as quickly as possible. If you see Tuesday, you might type 2 as quickly as possible.

There will be approximately 40 words, and the HIT should take about 2 minutes total.

Start Experiment

Consent to Participate in Research:

By answering the following questions, you are participating in a study being performed by cognitive scientists in the Harvard University Psychology Department. The purpose of this research is to examine human visual performance.

By participating you are confirming that you are over 18 years of age and have normal or corrected-to-normal vision.

If you have questions about this research, or if you would like to receive a report of this research when it is completed please contact Timothy Brady at

Your participation in this research is completely voluntary. If you choose to participate, you may change your mind and leave the study at any time. Refusal to participate or stopping your participation will involve no penalty or loss of benefits to which you are otherwise entitled.

You may decline to answer any or all of the following questions. Your anonymity is assured; the researchers who have requested your participation will not receive any personal information about you.

For questions, concerns, or complaints that are not being addressed by the researcher, or research-related harm contact: Committee on the Use of Human Subjects in Research at Harvard University, 1414 Massachusetts Avenue, Second Floor, Cambridge, MA 02138. Phone: 617-496-CUHS (2847). Email:

By continuing, you are confirming that you understand these instructions and conditions of participation.