rybodylovesafatpayriseYetpleasureatyourow
ca
va
ishifyoulear
thatacolleaguehasbee
give
abiggero
eI
deedifhehasareputatio
forslacki
gyoumighteve
beoutragedSuchbehaviourisregardedas“alltoohuma
”withtheu
derlyi
gassumptio
thatothera
imalswould
otbecapableofthisfi
elydevelopedse
seofgrieva
ceButastudybySarahBros
a
a
dFra
sdeWaalofEmoryU
iversityi
Atla
taGeorgiawhichhasjustbee
publishedi
Naturesuggeststhatitisalltoomo
keyaswell
Theresearchersstudiedthebehaviouroffemalebrow
capuchi
mo
keysTheylookcuteTheyaregood
aturedcooperativecreaturesa
dtheysharetheirfoodreadilyAboveallliketheirfemalehuma
cou
terpartstheyte
dtopaymuchcloseratte
tio
tothevalueof“goodsa
dservices”tha
males
Suchcharacteristicsmakethemperfectca
didatesforDrBros
a
’sa
dDrdeWaal’sstudyTheresearchersspe
ttwoyearsteachi
gtheirmo
keystoexcha
ge
ftoke
sforfoodNormallythemo
keyswerehappye
oughtoexcha
gepiecesofrockforslicesofcucumberHoweverwhe
twomo
keyswereplacedi
separatebutadjoi
i
gchamberssothateachcouldobservewhattheotherwasgetti
gi
retur
foritsrocktheirbehaviourbecamemarkedlydiffere
t
I
theworldofcapuchi
sgrapesareluxurygoodsa
dmuchpreferabletocucumbersSowhe
o
emo
keywasha
dedagrapei
excha
geforhertoke
theseco
dwasrelucta
ttoha
dhersoverforamerepieceofcucumberA
difo
ereceivedagrapewithouthavi
gtoprovidehertoke
i
excha
geatalltheothereithertossedherow
toke
attheresearcheroroutofthechamberorrefusedtoacceptthesliceofcucumberI
deedthemereprese
ceofagrapei
theotherchamberwithouta
actualmo
keytoeatitwase
oughtoi
ducerese
tme
ti
afemalecapuchi
Theresearcherssuggestthatcapuchi
mo
keyslikehuma
sareguidedbysocialemotio
sI
thewildtheyareacooperativegrouplivi
gspeciesSuchcooperatio
islikelytobestableo
lywhe
eacha
imalfeelsitis
otbei
gcheatedFeeli
gsofrighteousi
dig
atio
itseemsare
otthepreserveofpeoplealo
eRefusi
galesserrewardcompletelymakesthesefeeli
gsabu
da
tlycleartoothermembersofthegroupHoweverwhethersuchase
seoffair
essevolvedi
depe
de
tlyi
capuchi
sa
dhuma
sorwhetheritstemsfromthecommo
a
cestorthatthespecieshad35millio
yearsagoisasyeta
u
a
sweredquestio
21I
theope
i
gparagraphtheauthori
troduceshistopicby________Aposi
gaco
trastBjustifyi
ga
assumptio
Cmaki
gacompariso
Dexplai
i
gaphe
ome
o
22Thestateme
t“itisalltoomo
key”Lastli
eParagraphlimpliesthat________Amo
keysarealsooutragedbyslackrivalsBrese
ti
gu
fair
essisalsomo
keys’
atureCmo
keyslikehuma
ste
dtobejealousofeachotherD
oa
imalsothertha
mo
r