Jeff and rob have a difficult time getting along at work. most days, jeff spends a lot of time cracking jokes and goofing off, while rob constantly nags him and tells him to act like a grownup. on days when jeff is more reserved, rob does not nag him, hoping that this will result in improved behavior down the road. this is an example of which form of behavior modification

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a researcher conducts a comparison of the comments made in a publicly available blog and the blogger's comments on a similar topic in a weekly magazine. undergraduate students in a field methods class are assigned a research question and asked to interview another classmate, to be followed by a class discussion on interview techniques. a cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. a researcher sets up a meeting with the superintendent of a large and diverse public school system to get data about the ethnic composition of the school system and the number of students receiving free lunches.