Final answer:
Psychologists use observational techniques, interviews/surveys, and experiments to study the human mind and behavior.
Step-by-step explanation:
Psychologists use a variety of techniques to study the human mind and behavior. One method is observational techniques, where psychologists observe individuals to gather data and draw conclusions about their behavior. Another approach is conducting interviews or surveys to gather information directly from individuals. Psychologists also use experiments, where they manipulate variables and observe how it affects behavior. These techniques, among others, help psychologists gain insights into the cognitive and biological processes that underlie behavior.