A researcher who reads off a short list of numbers at a rapid pace and then asks a participant to repeat the numbers is most likely studying the lifespan of the participant.
This technique is used in psychology based studies.
In this type of asking researcher tries to read the brain of the participant and found out the problems going on in the life of the participant.
If there is any problem with the mind of the participant that could also be found easily.
Lifespan is the period of the time which is available between the birth and the death of a person.
To know more about lifespan here:
https://brainly.com/question/17372200
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