The data are taken from Owens, Shrestha, & Chaparro (2009). A webpage
was divided into 9 channels (sections), and the title color of the
"middle, left" and "middle, right" channels were manipulated.
The variable condition
takes the value Control
if all
title colors were black; Left
if the "middle, left" channel title
was red; and Right
if the "middle, right" channel title was red.