What refers to the likelihood that bystanders will provide help based on how others react?

The concept that refers to the likelihood that bystanders will provide help based on how others react is known as social influence. In situations where an emergency or need for assistance arises, individuals often look to the behavior of those around them to determine how to act. If others seem indifferent or do not intervene, bystanders may be less likely to offer help themselves, as they interpret the lack of action as a signal that intervention is unnecessary. This phenomenon can be explained through the concept of the 'bystander effect,' a social psychological theory that suggests that people are less likely to help a victim when other people are present, largely due to social cues and the diffusion of responsibility among the group.

In contrast, groupthink refers to a mode of thinking that people engage in when they are deeply involved in a cohesive in-group, often leading to poor decision-making due to a desire for harmony or conformity. Hostile perception bias involves perceiving others' ambiguous actions as aggressive, while hostile attribution bias is the tendency to interpret others' ambiguous behaviors as having hostile intent. These concepts do not specifically address the influence of observing others' reactions on an individual's likelihood to help in social situations.