Dogswag(摇摆)theirtailsindifferentdirectionsdependingonwhethertheyareexcitedandwantingtomoveforwardorthreatenedandthinkingofmovingbackastudyhasfound.
ResearchersinItalyexaminedthetailwaggingbehaviourof30dogscatchingtheirresponsestoarangeofstimuli(刺激物)withvideocameras.Toconductthestudytheychose15maledogsand15femaleonesagedbetweenoneandsixyears.ThedogswereallfamilypetswhoseownershadallowedthemtotakepartintheexperimentatBanUniversity.Thedogswereplacedinalargewoodenboxwithanopeningatthefronttoallowforthemtoviewvariousstimuli.Theyweretestedoneatatime.
TheresearchersledbyProfessorGiorgioVallortigaraoftheUniversityofTriestefoundthatwhenthedogswereshowntheirowners—apositiveexperience—theirtailswaggedenergeticallytotherightside.Whentheywereshownanunfamiliarhumantheywaggedtotherightbutwithsomewhatlessenthusiasm.Theappearanceofacatagaincausedaright-handsidewagalthoughwithlessintensityagain.TheappearanceofalargeunfamiliardogsimilartoaGermanshepherdchangedthedirectionoftailwaggingtotheleft.Reseacherssupposedthedogwasthinkingofmovingback.Whenthedogswerenotshownanystimulitheytendedtowagtheirtailstotheleftsuggestingtheypreferredcompany.Whilethechangesinthetailwaggingwerenoteasilynoticedwithouttheaidofvideoitwasthoughtthatthefindingscouldhelppeoplejudgethemood(心情)ofdogs.Computerandvideosystemsforexamplecouldbeusedbyprofessionaldogtrainerstodeterminethemoodofdogsthattheywererequiredtoapproach.
1.Thevideocameraswereusedtocatchthedogs’responsesbecause_______.
A.itwaseasiertocatchthedogs’responsechangesinthetailwagging
B.thedogswereputinthewoodenboxesandtestedoneatatime
C.theyenabledthedogs’ownerstoknowabouttheirdogs’habit
D.thedogswaggedtheirtailsindifferentdirectionswhentheywereindifferentmoods
2.Theunderlinedword“intensity”inthepassagemeans_______.
A.surprise
B.worry
C.excitement
D.interest
3.Whentherearenostimuliadogwill_______.
A.wagtotheleft
B.w
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