Research reports should describe the characteristics of the sample (i.e., who participated, the setting). These questions will help you to evaluate the researcher's data collection:

• Does the researcher describe the characteristics of the sample?
• What type of sample was used, random sample or convenience sample?
• What population does the researcher wish to describe? Do the sample characteristics match the population?
• How were data recorded (e.g., observers, self-report)? Are there any potential biases (e.g., participants trying to "look good" in their answers)?