Answer:
Primacy and recency effect.
Step-by-step explanation:
In social psychology, primacy effect is explained as the phenomenon which occurs when we tend to remember better the information that was given at the beginning of a series. We naturally recall more easily whatever it is that we see or hear first, than what comes next.
As opposed to the primacy effect, we have the recency effect that happens when we are able to more easily and efficiently appropriate the most recent information, the one we heard last.
Jason proves the accuracy of both of these principles, neglecting all the information that figured in the middle, while retaining only the first and the last.