The Internet Offers Many New Opportunities to Conduct Observational Research

The Internet offers many new opportunities to conduct observational research (that may not require informed consent). However, not all online studies or experiments are excused from obtaining informed consent from participants prior to their participation. Provide two examples of online studies where consent would not be required, and two examples of online studies where participants' consent would be required. Be sure to explain why those examples would or would not require participants' consent.