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Copyright Malvin Porter, Jr. 2010 - acumen - The University of ...

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Table 31<br />

CBVS Test and Confidence Interval for the Proportion <strong>of</strong> Bystander and the Proportion <strong>of</strong><br />

Victims Among Children who Selected Prosocial/Care Justification Choices<br />

Sample ƒ n Sample p<br />

Bystander 109 316 0.344937<br />

Victim 78 316 0.246835<br />

Test <strong>of</strong> p = 0 vs. p ≠ 0<br />

Difference = p (Bystander) – p (Victim)<br />

Estimate for difference: 0.0981013<br />

95% CI (0.0273424, 0.168860)<br />

Test for difference = 0 (vs. ≠ 0): Z = 2.72 P-Value = 0.007<br />

Fisher's exact test: P-Value = 0.009<br />

N = 632 responses<br />

A test for the Difference in Proportions tested the following null hypothesis: <strong>The</strong>re is no<br />

difference between children’s CBVS Aggressive/Retribution Justification Choices for stories that<br />

involved bystander story characters and the proportion <strong>of</strong> children CBVS Aggressive/Retribution<br />

Justification Choices for stories that involve victim story characters.<br />

Of the 316 responses to the Bystander Story Character scenarios, 32 were<br />

Aggressive/Retribution Justification Choices (sample p = 0.101266). Of the 316 responses to the<br />

Victim Story Character scenarios, 44 were Aggressive/Retribution Justification Choices (sample<br />

p = 0.139241). <strong>The</strong> estimate <strong>of</strong> the difference in the proportion <strong>of</strong> children’s<br />

Aggressive/Retribution Justification Choice responses when the Story Character was a bystander<br />

and the proportion <strong>of</strong> children’s Aggressive/Retribution Justification Choice responses when the<br />

Story Character was a Victim was -0.0379747. <strong>The</strong> hypothesized difference in proportions <strong>of</strong><br />

zero lies within the 95% CI (-0.0886044, 0.0126550) for the difference in proportions <strong>of</strong><br />

children’s Aggressive/Retribution Justification Choice responses between the bystander and<br />

victim story character roles. <strong>The</strong>refore, zero is a plausible value for the difference in proportions<br />

118

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