A fellow student failed to replicate the bystander effect, a well-established effect in social psychology.Because this student failed to find a statistically significant difference in helping behaviors as the number of bystanders increased, it is possible that the student:
A) made a Type II error.
B) made a Type I error.
C) committed a false positive.
D) committed the confounding variable error.

Question

Quizplus · Accepted Answer

A Type II error occurs when a researcher fails to reject a false null hypothesis, meaning they do not find an effect or difference when one actually exists. In this case, the student did not find the expected bystander effect, which could indicate a failure to detect an actual effect due to issues like insufficient power or sample size.

A Fellow Student Failed to Replicate the Bystander Effect, a Well-Established