Bystander Intervention in Emergencies

Bystander Intervention in Emergencies: Diffusion of Responsibility

Authors and Source

  • Authors: John M. Darley & Bibb Latané

  • Published in: Journal of Personality and Social Psychology, 1968, Vol. 8, No. 4, pp. 377-383

Research Overview

  • The study explores bystander intervention in emergencies and how the presence of others affects an individual's decision to help.

  • Key Concept: The phenomenon known as the diffusion of responsibility.

Background and Motivation

  • The study was motivated by real-life incidents where bystanders failed to intervene during emergencies, notably the Kitty Genovese case where 38 witnesses did not help a woman being attacked.

  • The lack of response from these bystanders was often attributed to feelings of apathy, alienation, and anomie.

  • The researchers aimed to analyze whether the presence of other observers reduces a person's likelihood to intervene, shifting the focus from individual indifference to the contextual influence of bystanders.

Theoretical Framework

  • Individuals face conflict when witnessing an emergency:

    • Humanitarian norms: urge the individual to help.

    • Fear of consequences: concerns about personal safety, public embarrassment, involvement with authorities, etc.

  • These conflicting motivators may lead to inaction, especially when other bystanders are present, which diffuses both the responsibility to act and the potential blame for failing to act.

Hypothesis

  • The more bystanders present during an emergency, the less likely any single bystander will intervene to offer help.

Experimental Procedure

Overview

  • The experiment involved a simulated emergency scenario to assess the impact of bystander presence on the likelihood and speed of intervention.

Participants

  • Total Subjects: 72 (59 females and 13 males)

  • Context: College students participated in an experiment regarding personal problems.

Method

  1. Setup: Subjects were placed in individual rooms with a communication system to facilitate discussions.

  2. Emergency Simulation: During the discussion, one participant simulated a seizure. The dependent variable measured was the speed at which subjects reported the emergency.

  3. Independent Variable: The perceived number of participants involved (2-person, 3-person, and 6-person scenarios).

  4. Confederates: The experiment used tape-recorded voices of confederates.

  5. Discussion Format: All subjects spoke in turn, and thus only one participant could hear the victim during the seizure.

Results

Effect of Group Size on Likelihood of Reporting

  • Percent Reporting by End of Fit:

    • 2-Person Group: 85%

    • 3-Person Group: 62%

    • 6-Person Group: 31%

  • Timing Data:

    • Group Size of 2 reported an average time of 52 seconds, Group Size of 3 reported 93 seconds, and Group Size of 6 reported 166 seconds.

Statistical Significance

  • The differences in likelihood and speed of reporting were statistically significant with p-values:

    • For response likelihood: ext{x}^2 = 7.91, p < .02

    • For speed scores: t' = 8.09, p < .01

Group Composition Variations

  • Variations examined whether the gender of other bystanders affected reporting speed:

    • Male bystander: fast response (62%)

    • Female bystander: no difference in response (62%)

    • Medical background: significant variation, but this did not markedly affect reporting speeds or likelihood of intervention.

Individual Difference Correlates

  • No significant correlation was found between personality measures and speed of reporting.

  • The only correlate was the community size in which the subjects grew up (r = -0.26, p < .05).

Discussion

Interpretations of Findings

  • The diffusion of responsibility significantly influenced subjects' intervention decisions. This suggests people do not perceive themselves as solely accountable when others are present.

  • The emotional responses exhibited by non-intervening subjects indicated indecision rather than apathy; they faced an internal conflict about intervening.

  • The results contrast with earlier findings suggesting gender-based differences in emergency intervention; here, males and females showed equivalent responses.

  • The typology of intervention can be further divided into:

    • Direct Intervention: Involves taking physical action.

    • Indirect Intervention: Reporting the emergency, which appears to show no gender bias.

Implications

  • Results challenge the predominant explanations attributing bystander inaction to personality deficiencies or urban alienation. Instead, it points to situational factors influencing behavior.

  • Understanding the situational dynamics of bystander intervention might help in developing strategies to encourage assistance in emergencies.

References

  • A comprehensive list of references cited, asserting previous studies and theoretical backgrounds in bystander intervention understanding.