<span>Experimenter bias, this is related to the threats to internal validity. This means, that in a scientific research where you want to get a very specific result, there could be variations and an unconscious influence on the experimental group's opinion or mindset. there are many ways this could happen, and to prevent experimenter bias there are several strategies to follow.</span>
Answer:
Display rules
Explanation:
Natalie, an American student studying abroad in Taiwan, is at a restaurant when she sees a waitress drop a tray of drinks and then giggle. Natalie finds this reaction odd. This incident is not a sign that the waitress thinks mistakes are funny, but it is instead an example of cross-cultural differences, relayed by display rule;Display rules are a social group or culture's informal norms about how to appropriately express emotions
Performance is carrying out a behavior that was learned first.
I think is the answer
