Professor Lopez is researching the effectiveness of a new method of teaching reading to ...

Professor Lopez is researching the effectiveness of a new method of teaching reading to second-language learners.
 
  Prior to testing his new method, he had to ensure that all
  participation was voluntary, confidential, and harmless. Through this process he was
  seeking the ______ of participants.
  Fill in the blank with correct word

Question 2

Research subjects' participation must always be ______, and the information obtained from a particular subject must be kept ______.
 
  Fill in the blank with correct word

Question 3

Each academic discipline and professional society involved in research on human development has a code of ______, a set of moral principles.
 
  Fill in the blank with correct word

Question 4

Brett asked a group of high school students a series of open-ended questions about their study habits. He was conducting ______ research.
 
  Fill in the blank with correct word