Final answer:
The statement that it is unethical to not express disagreement in a group discussion is false, as ethical considerations might be complex. Groupthink occurs when group members align with perceived consensus, which can suppress dissent and critical thinking.
Step-by-step explanation:
The statement from Effective Group Discussion suggests that it is unethical not to express your disagreement with what another group member proposes during a discussion of ends or means is false. While it is important to share diverse viewpoints in a group discussion for the sake of intellectual honesty and group effectiveness, ethical considerations can be complex. There could be various reasons someone might choose not to express disagreement, including a desire to avoid unnecessary conflict or a strategic decision that it's not the right moment to bring up objections.
In the context of group dynamics, when group members modify their opinions to align with a perceived group consensus, a phenomenon known as groupthink may have occurred. Groupthink can lead to poor decision-making as it suppresses dissenting opinions and critical thinking. However, a respectful group environment should encourage the free expression of ideas, allowing for healthy disagreement and debate.