Figure 3.
The relation between maternal melancholia and child depression for (left panel) children above the sample median on respiratory sinus arrhythmia (RSA) and (right panel) children below the sample median on RSA. As indicated by the regression lines, there is a strong relation between maternal melancholia and child depression for children high in RSA, yet there is no relation between maternal melancholia and child depression for children low in RSA. Note that there are many points of overlap because responses on both plotted variables were discrete. [A color version of this figure can be viewed online at www.journals.cambridge.org.]