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. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: Psychol Methods. 2011 Nov 21;17(1):61–77. doi: 10.1037/a0025814

Figure 1.

Figure 1

A Hypothetical example of the time-varying relationship between negative affect and urge to smoke. The solid line in the upper plot represents the negative affect scores from a single individual plotted over the time interval [0, 1]. Smoking urges for the same individual are plotted in the middle graph. Vertical dashed lines partition the study period into three equally spaced intervals: [0, .33), [.33, .67), [.67, 1.0]. Corresponding scatter plots of negative affect and smoking urges from the three periods are plotted at the bottom. Fitted linear regression lines demonstrate the directionality and the extent of the association between negative affect and smoking urges.