For any behaviour to be defined as addictive, there have to be specific consequences such as it becoming the most important activity in the person's life or being the way they improve their mood.
In other words, behaviour that was once considered mere foreplay, a kind of precursor or accessory to the main event - the starter, if you like - is increasingly becoming the main course.
If the EEG and pilot's behaviour indicate that he is becoming overwhelmed, it can temporarily "grey out" less vital onscreen information and reduce incoming radio communications.
Most economists think that the CPI method is the right one, because its formula mimics the behaviour of consumers, who buy less of a product that is becoming relatively dearer.
Suzanne Segerstrom, professor of psychology at the University of Kentucky, believes that the key to increasing optimism is through cultivating optimistic behaviour, rather than positive thinking.
This shows that teens may find it more difficult to control risky behavior when their friends are around, or in situations where they are extremely angry.
Their risky behaviors—drinking too much alcohol, using illegal drugs, smoking cigarettes and skipping school—can alert parents and teachers that serious problems are brewing.
The only initiative in the field that he does not welcome is a competition which a Swiss-based foundation launched to choose the “seven new wonders of the world” by electronic ballot.