Final answer:
The individual knowledge effect is a barrier to sharing expertise within a health care team, where individuals may hesitate to contribute something new due to fear of judgment or criticism.
Step-by-step explanation:
The barrier to sharing expertise within a health care team due to the tendency to not speak up and contribute something new is called the individual knowledge effect. This refers to individuals feeling hesitant to share their unique knowledge or ideas because they fear being judged or criticized by others in the team. By not speaking up, valuable expertise and insights are lost, which can hinder collaboration and problem-solving within the health care team.