Please read instructions for each part carefully, as we do not give credit for random button pushing or failure to follow instructions, or attempts to "cheat" the assignment. If you do not understand the instructions, please sign up for and do some other study instead.
The three tasks below require about 10 minutes each.
In order to get full credit, you must (a) complete all parts below AND (b) you must work for at least 30 minutes. If you finish the parts below, follow the link and continue working until you have worked for 30 min.
Credit is checked both by computer and by a human who will
check to make sure that you followed instructions. The human
will not check the data until AFTER all participants have
completed the study. Do NOT expect credit until 48 hours
after the FINAL DATE and TIME for the session.