It's that time of year again, when we all plan to change. The year is coming to an end, the beginning of the new year seems to offer fresh opportunities; but we all know that for some reason, the changes we vow to make usually don't last.

In their weekly conversation, WHYY's behavioral health reporter Maiken Scott and psychologist Dan Gottlieb talk about change - why we want it, and why it's so hard to achieve.