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Why do people behave in particular ways ? " " When we have people come in with their kids , and the kids sit down with the machine , they're not thinking about all the stuff behind it , " Lilagan said . When we were at Xfm , we used to have people come in and give us promotional stuff , to plug whatever they were doing . The goals of the work in the DDL are to provide a theoretical framework that moves beyond the one-dimensional views that dominate behavioral science and thus to help people flourish in many different ways . Portrait photographers need the ability to help people relax in front of the camera .