Measurement
ARI: Affective Reactivity Index
Reference and/or access link:
Stringaris, A., Goodman, R., Ferdinando, S., Razdan, V., Muhrer, E., Leibenluft, E. and Brotman, M.A. (2012). The Affective Reactivity Index: a concise irritability scale for clinical and research settings. J Child Psychol Psychiatry, 53(11): 1109-17.
doi:10.1111/j.1469-7610.2012.02561.x