Armed with new research into what makes some people environmentally conscious and others less so, the 148,000-member American Psychological Association is stepping up efforts to foster a broader sense of eco-sensitivity that the group believes will translate into more public action to protect the planet. “We know how to change behavior and attitudes. That is what we do,” says Yale University psychologist Alan Kazdin, association president. “We know what messages will work and what will not.” American Psychological Association leaders say they want to launch a national initiative specifically targeting behavior changes, including developing media messages that will help people reduce their carbon footprint and pay more attention to ways they can conserve.