Impact of progress feedback on task completion: first impressions matter. - Frederick G. Conrad; Mick P. Couper; Roger Tourangeau; Andrey Peytchev (CHI Extended Abstracts, 2005)

The impact of progress indicators on task completion. - Frederick G. Conrad; Mick P. Couper; Roger Tourangeau; Andrey Peytchev (Interact. Comput., 2010)