Figure 1.

A sample trigram stimulus. In this example, the trigram “tea” is located at position −4. The three letters are positioned at −5 (“t”), −4 (“e”), and −3 (“a”), respectively. Position 0 is right below fixation. Position −4 indicates that the corresponding letter is to the left of the vertical midline and that the distance between the letter and the midline, or position 0, is four times the standard letter spacing.