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. Author manuscript; available in PMC: 2013 Jul 17.
Published in final edited form as: Eye Contact Lens. 2012 Jul;38(4):252–259. doi: 10.1097/ICL.0b013e31825aa879

Figure 2.

Figure 2

Limits of agreement for the difference between the observed and expected rating responses for the ghosting attributes of (a.) Direction, (b.) Position-offset, (c.) Focus, and (d.) Intensity for the direct match case of a 20/160 target on the monitor and this same size target on the ghosting questionnaire. The symbols represent the mean difference for each subject’s five trials for each rating number in the series. The x-axis represents the expected rating on the ghosting questionnaire. The solid black horizontal line represents the mean difference score for all subjects and rating levels. The black long dashed line represents the best-fit linear regression line, and the short dashed black horizontal lines the 95% Limits of Agreement for the difference scores. Note that when the stimulus level is 1, the difference scores can range from 0 to 9, when the stimulus level is 5, can range from −4 to +5, and when stimulus level is 10, the difference score can range from 0 to −9.