Chan-ju and lucas are researchers studying consumer behavior. chan-ju goes to a store and watches the shoppers for several days. she takes very careful notes about what she sees the shoppers doing, but she does not talk to the shoppers or interact with them in any way. lucas goes to a store and asks each shopper a series of questions. he makes sure to ask these questions of each shopper in the store. chan-ju's study is an example of a(n) and lucas's study is an example of a

Naturalistic Observation and Survey

Explanation:

A study on consumer behavior is intended to provide data on the real behavior  of customers.

Naturalistic observation is a strategy of studies that psychologists and  other social scientists frequently use. This approach focuses on the  observation of an individual or subject in their natural environment.

A survey is described as a technique of study used to gather data from a  predetermined group of participants in order to obtain information and  perspectives on different subjects of concern.

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