Similarly, traits are distin guished from most symptoms  because symptoms tend to
wax and wane, whereas traits are relatively more stable. For example, individuals with
higher levels of depressivity  have a greater likelihood of experiencing discrete episodes of a
depressive disorder and of showing the sympto ms of these disorders, such difficulty con-
centrating. However, even patients  who have a trait propensity to depressivity  typically cy-
cle through distinguishable episodes of mood disturbance, and specific symptoms such as