Performance interviews are usually carried out once every 3 to 6 months on a regular basis. Your boss, supervisor or manager, will get together with you to analyze how you performed during the last months and specially if your performance was better or worse than the previous period.
The reason why this interviews are carried out is to find out how to improve an employee's performance and if it has been decreasing, how to reverse that situation. Another reason for this type of interview is to set your goals for the next period and any possible bonus at stake. This applies specially to salespeople that earn a small fixed salary + sales commissions + bonuses.
Answer: Dependability is defined as the quality of being able to be counted on or relied upon. When you always do everything that you say you will and never make promises you cannot keep, this is an example of dependability. YourDictionary definition and usage example.
In this scenario, where he believes that this group of students will be representative of the university student population in the United States, the professor is most likely using Judgment or Expert sampling which is normally used in circumstances where the pointed population involves very intelligent people like student of the University of United States here who cannot be determined by using any different type of probability or non-probability sampling method.
