IRM 2-14
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Answer: A
a. Correct. The bystander effect finds that as the number of bystanders increases, the likelihood that any
individual will intervene decreases. With only two bystanders there is greater likelihood that one of the
individuals will perceive an obligation to intervene. See “Victimology Contributes to the Rediscovery
Process,” LO5, Bloom’s: Remember
b. Incorrect. The bystander effect finds that as the number of bystanders increases, the likelihood that any
individual will intervene decreases. With five bystanders the likelihood that these bystanders perceive that
the obligation to intervene falls to someone else increases. See “Victimology Contributes to the
Rediscovery Process,” LO5, Bloom’s: Remember
c. Incorrect. The bystander effect finds that as the number of bystanders increases, the likelihood that any
individual will intervene decreases. With 10 bystanders diffusion of responsibility to someone else is
heightened to a point that intervention is less likely. See “Victimology Contributes to the Rediscovery
Process,” LO5, Bloom’s: Remember
d. Incorrect. The bystander effect finds that as the number of bystanders increases, the likelihood that any
individual will intervene decreases. With 15 bystanders present, there is a low probability that any one of
these bystanders will intervene. See “Victimology Contributes to the Rediscovery Process,” LO5,
Bloom’s: Remember
What Would You Do?
Due to the publicity surrounding the case and the interest in the action and inaction of the
bystanders, the mayor’s office gives you funding to help you with your investigation and research.
The goal of your research is to gain an understanding of the bystander effect in the attack and to
potentially make recommendations for future community education. You begin to examine the best
way to collect information. With limited resources, it’s not feasible to gather information from all of
the bystanders that witnessed the attack. You must decide on whether to focus your efforts towards
interviewing Mr. Harding who actively intervened and effectively ended the attack or to
interviewing some of the witnesses that failed to intervene during Mrs. Edgar’s assault.
What would you do?
a. You decide to interview Mr. Harding to understand what caused him to intervene. You believe
Mr. Harding agrees to meet with you once you explain that you are collecting information for
research purposes as part of a mayoral initiative to potentially make recommendations for
community education.
Mr. Harding tells you that on the afternoon of the assault, he arrived home and thought something
in the complex might be “off” as there were several neighbors gathered outside of his building,
whispering to each other. As he was walking up the stairs to his unit, he heard a single scream but
initially dismissed it as children playing. However, after hearing an additional scream followed by a