Martha filled with positive spirits after perceiving the smell of Robert's
cologne on someone is most likely as a result of spontaneous recovery.
Spontaneous recovery happens when there is a sudden re-appearance of
memory which has been previously forgotten. The conditioned memory
which Martha has extinguished (in this case Roberts cologne) reappeared
and she immediately responded to it.
Martha was immediately filled with positive feelings, this means that she
displayed a behavior which she had previously formed through 'classical
conditioning' when she was still in love with Robert.
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