Answer: recency effect
Explanation: Recency effect is a phenomenon associated with human memory whereby the most recent or latter information are better remembered or stays in memory than former or previous information. In recency effect, most recent information are also given more credence than former information and therefore seems to influence one's judgement and decision making than prior information.
Jammin' Jamie is most likely affected by the recency effect as highlighted by his ability to remember only the last few requests which also translates to the most recent information received.