But there are subtle - and _______ -- differences in our laughs with friends. Greg Bryant, a cognitive scientist at the University of California, Los Angeles, and his colleagues previously found that adults from 24 societies around the world can distinguish simultaneous "co-laughter" between friends from that between strangers. The findings suggested that his ability may be _______ used to help read social interactions. So the researchers wondered: Can babies distinguish such laughter, too? Bryant and his fellow researcher Athena Vouloumanos, a developmental psychologist at New York University, played recording of co-laughter between _______ of either friends or strangers to 24 five-month-old infants in New York City. The babies listened _______ to the laughs shared between buddies - suggesting they could tell the two types apart, according to a study published in March in Scientific Reports. The researchers then showed the babies short videos of two people acting either like friends or strangers and paired those with the _______ recordings. The babies stared for longer at clips paired with a mismatched recording - for example, if they saw friends _______ but heard strangers laughing. "There's something about co-laughter that is giving _______ to even a five-month-old about the social relationship between the individuals," Bryant says. Exactly what components of laughter the infants are detecting remains to be seen, but prior work by Bryant's team provides _______. Laughs between friends tend to include greater variations in pitch and _______, for example. Such characteristics also distinguish ________ laughs from fake ones. Many scientists think heartfelt laughter most likely ________ from play vocalizations, which are also produced by nonhuman primates, rodents and other mammals. Fake laughter probably emerged later in humans, ________ that ability to produce a wide range of speech sounds. The researchers suggest that we may be ________ to spontaneous（自发的）laughter during development because of its long evolutionary history. It's really cool to see how early infants are distinguishing between different forms of laughter," says Adrienne Wood, a psychologist at the University of Virginia, who was not involved in the study. "Almost every ________ moment is a social interaction for babies. Therefore it ________ that they are becoming very much accustomed to their social worlds." 【小题1】 A．distinct B．invisible C．detectable D．conscious 【小题2】 A．universally B．apparently C．fairly D．precisely 【小题3】 A．groups B．pairs C．rivals D．partners 【小题4】 A．shorter B．longer C．less patiently D．more diligently 【小题5】 A．friendly B．strange C．visual D．audio 【小题6】 A．interacting B．reflecting C．clubbing D．interpreting 【小题7】 A．value B．meaning C．information D．friendship 【小题8】 A．accounts B．implications C．routes D．hints 【小题9】 A．engagement B．frequency C．intensity D．length 【小题10】 A．obliged B．involuntary C．encouraged D．internal 【小题11】 A．evolved B．heaped C．sprang D．originated 【小题12】 A．apart from B．along with C．as against D．ahead of 【小题13】 A．available B．crucial C．sensitive D．neutral 【小题14】 A．screaming B．kicking C．shifting D．waking 【小题15】 A．turns out B．comes true C．rings hollow D．makes sense

Friendly Laughter

Most people can share a laugh with a total stranger. But there are subtle - and _______ -- differences in our laughs with friends.

Greg Bryant, a cognitive scientist at the University of California, Los Angeles, and his colleagues previously found that adults from 24 societies around the world can distinguish simultaneous "co-laughter" between friends from that between strangers. The findings suggested that his ability may be _______ used to help read social interactions. So the researchers wondered: Can babies distinguish such laughter, too?

Bryant and his fellow researcher Athena Vouloumanos, a developmental psychologist at New York University, played recording of co-laughter between _______ of either friends or strangers to 24 five-month-old infants in New York City. The babies listened _______ to the laughs shared between buddies - suggesting they could tell the two types apart, according to a study published in March in Scientific Reports.

The researchers then showed the babies short videos of two people acting either like friends or strangers and paired those with the _______ recordings. The babies stared for longer at clips paired with a mismatched recording - for example, if they saw friends _______ but heard strangers laughing.

"There's something about co-laughter that is giving _______ to even a five-month-old about the social relationship between the individuals," Bryant says. Exactly what components of laughter the infants are detecting remains to be seen, but prior work by Bryant's team provides _______. Laughs between friends tend to include greater variations in pitch and _______, for example.

Such characteristics also distinguish ________ laughs from fake ones. Many scientists think heartfelt laughter most likely ________ from play vocalizations, which are also produced by nonhuman primates, rodents and other mammals. Fake laughter probably emerged later in humans, ________ that ability to produce a wide range of speech sounds. The researchers suggest that we may be ________ to spontaneous（自发的）laughter during development because of its long evolutionary history.

It's really cool to see how early infants are distinguishing between different forms of laughter," says Adrienne Wood, a psychologist at the University of Virginia, who was not involved in the study. "Almost every ________ moment is a social interaction for babies. Therefore it ________ that they are becoming very much accustomed to their social worlds."

【小题1】

A．distinct B．invisible C．detectable D．conscious

【小题2】

A．universally B．apparently C．fairly D．precisely

【小题3】

A．groups B．pairs C．rivals D．partners

【小题4】

A．shorter B．longer C．less patiently D．more diligently

【小题5】

A．friendly B．strange C．visual D．audio

【小题6】

A．interacting B．reflecting C．clubbing D．interpreting

【小题7】

A．value B．meaning C．information D．friendship

【小题8】

A．accounts B．implications C．routes D．hints

【小题9】

A．engagement B．frequency C．intensity D．length

【小题10】

A．obliged B．involuntary C．encouraged D．internal

【小题11】

A．evolved B．heaped C．sprang D．originated

【小题12】

A．apart from B．along with C．as against D．ahead of

【小题13】

A．available B．crucial C．sensitive D．neutral

【小题14】

A．screaming B．kicking C．shifting D．waking

【小题15】

A．turns out B．comes true C．rings hollow D．makes sense