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.
Experimental setup. A: features common to pretest 1, pretest 2, and the main experiment. B–D: the visual feedback for each test, where the red circle or rectangle represents the actual force and the blue circle or rectangle represents the target force.
