ANSWER: A SINGLE-PARTICIPANT EXPERIMENT
EXPLANATION: A single-participant experiment involves the indepth study or analysis of one participant or unit continuously over a period of time.
This kind of research usually engage only one individual or Unit at a time, mainly to assess the relationship between different variables. This kind of research has proven to be very accurate in many occasions than having multiple study individuals or groups.
Thus, in the case of Kira, her behavioral response is been tested for, using the same set of procedure or action over and over again.