Figure 3
Plot of anxiety rating (panel 3a) and frustration rating (panel 3b) vs. unpleasantness (A 1 ) for healthy subjects (closed circles, solid line) and COPD patients (open circles, dashed line). Ratings are for the last 30 seconds of moderate intensity and high intensity laboratory stimuli. Scale maxima were defined as ‘Unbearable’ for unpleasantness and ‘most I can imagine’ for emotion. Error bars reflect standard errors.