With the idea that adaptive emotion regulation requires flexibility we developed a task that allows participants to choose regulation strategies on a trial by trial basis.      Sheppes, G., Scheibe, S., Suri, R., Radu, P., Blechert, J., & Gross, J.J.
    (in press). Emotion Regulation Choice: A Comprehensive
    Framework and Supporting Findings. Journal of
    Experimental Psychology: General. IF: 4.76

We are currently expanding this research to include patients with major depression.