Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Original data of target (bold line) and cursor (thin line) paths in four experimental episodes of one subject under normal viewing conditions (top graphs) and immediately after up–down reversal (bottom graphs). Responses in single- (left graphs) and dual-task (right graphs) conditions are shown. Target movement direction is indicated by an arrow. Note the deterioration of tracking performance after reversal.
