问答题 The regular use of text messages and e-mails can lower the IQ more than twice as much as smoking marijuana. That is the claim of psychologists who have found that tapping away on a mobile phone or computer keypad or checking them for electronic messages temporarily knocks up to 10 points off the user's IQ. This rate of decline in intelligence compares unfavourably with the four-point drop in IQ associated with smoking marijuana, according to British researchers, who have labelled the fleeting phenomenon of enhanced stupidity as "infomania". The noticeable drop in IQ is attributed to the constant distraction of "always on" technology when employees should be concentrating on what they are paid to do. Furthermore, infomania is having a negative effect on work colleagues, increasing stress and dissenting feelings. Nine out of ten polled thought that colleagues who answered e-mails or messages during a face-to-face meeting were extremely rode. Yet one in three Britons believes that it is not only acceptable, but actually diligent and efficient to do so.