A robbery was attempted at Randolph's house when he was sleeping in his bedroom. He thwarted this attempt and in the process gravely injured one of the robbers. Randolph's action in this case is justified according to which of the following?

An increasing number of researchers are conducting experiments over the Internet because of the advantages it affords. Which of the following is NOT a disadvantage of using the Internet to conduct and experiment?

a. the experiment is brought to the participant instead of the participant coming to the experiment b. there is a less experimental control c. there is a greater probability of self-selection d. there is a greater probability of dropout of participants

The primary ethical concern of physical evidence analysis is

A) the researcher's bias. B) time for discussion. C) privacy and confidentiality of data. D) lack of research methodology.