Answer:
taking into account that neurons respond differently to different faces I can say that there are two ways in which neurons code the stimuli intensity.
1. frequency coding: that means that the firing rate of sensory neurons increases with increased intensity.
2. population coding: that means this way stimuli is represented by using the joint activities of a number of neurons. Also called RECRUITMENT.
Explanation:
in this case, the results support number 1, frequency coding.