1. An updating calculation of the president's Approval rating, accounting for each poll's quality, recency, sample size and partisan lean

2. Recency effects Problem: When the manager, according only to the last performance, that has been quite good, rates higher.

3. In the time 2 since A4 is Accessed, the recency will become 0 for A4 and 1 for A1 because A4 is the most recently Accessed Object and IRR will become 4 and it will go on