Final answer:
In a planning poker session with varying estimates, the team members with the highest and lowest estimates discuss their reasons, leading to another estimation round to achieve consensus.
Step-by-step explanation:
The question relates to a planning poker session, which is a technique used in agile software development for estimating work effort. After team members have provided their estimates and there is some disparity, as in the case with the estimates of 1, 5, 5, 5, and 8, the next step typically involves a discussion amongst the team members. The person who gave the highest estimate and the person who gave the lowest estimate present their reasons for their assessment. After this exchange, another round of estimation is conducted, ideally leading to a consensus or at least a narrowing of the range of estimates.