Tell us about the arowanaâaka the dragon fishâand why it has become so valuable. The Asian arowana is the worldâs most expensive aquarium fish. It is a tropical freshwater fish from Southeast Asia that grows three feet long in the wild. Thatâs roughly the size of a snowshoe. [Laughs.] It is a fierce predator dating back to the age of the dinosaurs.
A personality disorder is an enduring pattern of inner experience and behavior that deviates markedly from the expectations of the individual's culture, is pervasive and inflexible, has an onset in adolescence or early adulthood, is stable over time and leads to distress or impairment.
Cognitive psychology is a pure science, based mainly on laboratory experiments. Behavior can be largely explained in terms of how the mind operates, i.e. the information processing approach.The mind works in a way similar to a computer: inputting, storing and retrieving data.ognitive psychology is also a reductionist approach. This means that all behaviour, no matter how complex can be reduced to simple cognitive processes, like memory or perception. Typically cognitive psychologists use the laboratory experiment to study behavior.