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During what time frame was the sample for Piliavin et al's study collected?

  1. 8am to 10am on a weekday

  2. 11am to 3pm on a weekday

  3. 1pm to 5pm on a weekend

  4. All day Saturday

The correct answer is: 11am to 3pm on a weekday

The sample for Piliavin et al.'s study was collected during the time frame of 11am to 3pm on a weekday. This period was chosen because it allowed the researchers to observe individuals in a naturalistic setting on a busy subway line in New York City. The selected hours were significant as they reflected a time when the subway was crowded with commuters, increasing the likelihood of interactions that could be studied for helping behavior. This timeframe aligns with the goals of the study, which aimed to investigate how factors such as the perceived need for help and the characteristics of the person in need influenced whether or not bystanders would intervene. Furthermore, this specific time frame helped to control for variables that might differ significantly on weekends or outside of commuting hours, providing a more consistent context for the observations made during the research.