The correct answer is smoking.
Many studies were conducted to try and prove the correlation between smoking and schizophrenia, and most of them gave the expected results - there is a relationship between the two. Most people who suffer from this disorder smoke - the reasons for this are various: since they are usually unemployed, they smoke as a way to relieve boredom or stress and anxiety, etc.
To interpret the constitution
Answer: Naturalistic Observation
Explanation: Naturalistic Observation involves the study of a subject in their natural environment. The purpose of this study is to understand how the subject interacts with their environment naturally without the conditions of a laboratory. Another factor which may make this kind of study attractive is a limited budget.
For example, in Professor Carter's study, recreating a supermarket in a laboratory will not only be expensive but may also influence the subjects' choice of groceries and affect the result of the study.
