.The consumer decision making process is the process by which consumers become aware of and identify their needs; collect information on how to best solve these needs; evaluate alternative available options; make a purchasing decision; and evaluate their purchase.

2.heightened attention -It refers to one of the types of information search process where a consumer pays more attention to the product information at a receptive level.

3.expectancy value theory and calculation- The theory postulates that achievement-related choices are motivated by a combination of people's expectations for success and subjective task value in particular domains. For example, children are more likely to pursue an activity if they expect to do well and they value the activity.

4.Consumers play five different roles such as Initiator, Influencer, Decider, Purchaser, and User. One person initiates and the other person influences, finally one person among the family decides and purchases. In some case different people play different roles and in some cases same people play more than one role.

5.decision choice sets- individual consumer choice decision-making appropriate to the study of many marketing decisions. It summarizes issues relating to consideration set effects on consumer judgment and choice. It discusses whether consideration sets really exist and, if so, the factors that affect their composition, structure, and role in decision-making. It examines some new developments in the measurement and modeling of consideration set effects on decision-making.