A student conducted a research project in which fake smoke entered the waiting area used by participants. This procedure was used to create a stressful situation and the student then tested participants' performance on complex reasoning tasks. One student waiting in a wheelchair experienced a panic attack when the smoke appeared. After this incident, the IRB stopped the research. This example demonstrates that

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The fact that the person in a wheelchair suffered a panic attack showed that b. characteristics of individuals must be considered when determining risk.

Why did the IRB stop the research?

When introducing a stressful situation for research, it is important that the risk to the participants are assessed.

This risk should be based on each participant's individual characteristics because humans react differently to the same stimulus. The researcher here failed to do this and so the research was stopped.

Options include:
a. Risk assessment should only be carried out when a person in a wheelchair is involved.

b. characteristics of individuals must be considered when determining risk.

c. characteristics of group must be considered when determining risk.

Find out more on the IRB's role in research at https://brainly.com/question/8905808.

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