<p>Isyoursmartphonemakingyoustupid?Canyoumakeyourselfcleverer?TheGreatBritishIntelligenceTestmeasuresthebrainpowerofthenationinoneofthelargestintelligenceexperimentsofitskind.
DevisedwithleadingscientistsatImperialCollege,London,over250,000peoplearoundthenationhavetakenpartsofar-revealingimportantnewscienceaboutthenation’s...</p>
