Introduction to APA Ethics and Research Ethics

After reading the assigned pages from the Research Methods chapter + APA Ethics Code:
https://www(dot)apa(dot)org/ethics/code
1) Answer the following question: Do ethics only apply to researchers according to the APA? Explain your answer.
2) Answer the following questions regarding the description of a research study:
Middlemist, Knowles, and Matter (1976) conducted a study investigating whether or not invasions of personal space are physiologically, as well as psychologically, arousing. The study was conducted in a men’s lavatory. Men were randomly assigned to have personal space or to have their personal space invaded. The investigators closed off specific urinals. Participants were forced to urinate either in the urinal next to a male confederate or in the urinal one away from the confederate. A second confederate positioned in a toilet stall adjacent to the urinals observed the subjects via a periscope and recorded the latency to onset of urination and its duration.
What are the variables of interest? If there is an independent and dependent variable, please identify them.
What type of research strategy is being used (i.e., descriptive, correlational, experimental)?
What methods are being used to collect the data (e.g., observational, case study, ethnography, naturalistic observation, survey)?
What is the setting (e.g., lab, field, or combination)?
What specific ethical issues pertain to the study (e.g., deception, stress, lack of info.)?
How could the ethical problems be remedied?