Independent variables, dependent variables and control variables in psychological bystander effect

Independent variable: the number of bystanders.

Dependent variables: the number of help-seeking and the length of response time.

Control variables: weather, time (such as waking up in the morning, tired at night and not wanting to help), fatigue, etc.

As long as the control variables are well controlled or the control group is well done, it is good to study the relationship between independent variables and dependent variables.

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