Doyoueverdohomeworkwhilelisteningtomusic，orwatchTVwhiletextingfriend？Itmayseemlikeanobviousquestionsincemostofusmultitask（做多个任务）allthetime．ButaccordingtoarecentstudypublishedinthejournalPLOSON
Doyoueverdohomeworkwhilelisteningtomusic，orwatchTVwhiletextingfriend？Itmayseemlikeanobviousquestionsincemostofusmultitask（做多个任务） allthetime．
ButaccordingtoarecentstudypublishedinthejournalPLOSONE，using anumberofmediadevices（媒体设备） atthesametmecouldbechangingourbrains．
ThereportwascarriedoutbySussexUniversityintheUK．Researchersfirstasked75adultsabouthowoftentheyspenttimemultitaskingbetweendifferentkindsofmedia．ThentheycheckedtheibrainswithanMRImachine．Thosewhoreportedheaviermediamultitaskinghadlessgraymatterintheirbrains．Graymatteristhepartofthebrainthathelpstodealwithinformationandcontrolemotions（情感）．
Soismultitaskingreally rotting ourbrainsandmakingusstupid？Wecan'tbesure，accordingtoresearchers．
Theysaythattheresultsonlyshowalink．Theyareunsurewhethermultitaskingreducesgraymatterorifpeoplewithlessgraymatteraresimplymorelikelytomultitask．
"Mediamultitaskingisbecomingmorepopularinourlivestodayandthereisincreasingconcernaboutitsinfluence（影响） onourwell-being，"saidBritishscientistKepKeeLoh，whodirectedthestudy．
Lohsaysthatmorestudyisneededtosupporttheideathatourbehaviorsarechangingourbrains．Butifit'strue，itcouldsupportearlierstudiesaboutmediamultitasking．
In2012，astudybyMichiganStateUniversityintheUSfoundthatpeopleusingseveralmediadevicesatthesametimeweremorelikelytobeanxiousordepressed．
Itseemsthatmoreresearchintotheissueisneeded．Butnomatterwhat，youshouldconsiderliiting（限制） yourselftoonescreenatatime，theHuffingtonPostreported．
Foronething，Multitaskingdoesn'tactuallyworkifyouaretryingtobemoreefficient（有效率的）．You'regoingfromoneactiontoanotherinsteadoftrulydoingtwothingsatatime．Itwastesyourenergyandslowsyoudown．And onceyou'vesloweddown，itcanbehardtopickbackupwhereyouleftoff．
Ifyouwanttofinishalistofjobs，"setgoals，establisharoutine（常规），andtakeregularbreaks"，suggestedTheHufingtonPost．
21．WhatdidtherecentstudybySussexUniversityfind？___
A．Mostpeopl