没有话语？没问题.
他们可能还没有说话，但事实证明，婴儿可以在5个月大的时候识别对方的情绪，正确地将快乐或沮丧的婴儿的声音与适当的面部表情相匹配.
对于父母来说，外表是婴儿非常了解情绪，作为杨百翰大学心理学副教授罗斯弗洛姆说，这项新研究的合着者 – 第一个与孩子一起研究“同伴匹配”能力的人年轻。该研究发表在“婴儿期”杂志上。
“这突出了婴儿对我们的交际意图非常敏感的事实，”Flom告诉今天的妈妈.
“他们真的可以理解我们是怎么说的，所以如果你和一个年幼的婴儿说话，他们可能不会完全明白你在说什么，但他们肯定会理解它是如何传达的。”
研究人员对结果并不十分惊讶。研究表明，婴儿可以匹配7个月及以下的成年人的情绪。但到目前为止，很少有人研究婴儿对其他婴儿情绪表达的看法.
四十名婴儿参加了这项研究：一半是3.5个月大，另一个是5个月大.
（在一个有趣的旁注中，研究人员指出，由于“过度烦躁”，“入睡”和其他问题，其他一些婴儿的数据必须被排除在外。“我们有点怜悯或随心所欲，”弗洛姆说。）
在实验过程中，婴儿坐在两个监视器前面。一个人展示了一个快乐，微笑的婴儿的视频，而另一个人播放了第二个悲伤，皱眉的婴儿的镜头.
然后，播放了一个快乐或悲伤的婴儿的音频。两段视频中的录音与婴儿的嘴唇动作并不一致.
当听到“快乐”的音频时，5个月大的婴儿看着婴儿的视频看起来更长，面部表情积极。同样地，当听到沮丧的婴儿的声音时，5个月大的孩子也能够将“负面发声”与悲伤，皱眉的婴儿的视频相匹配.
研究人员没有发现该研究中3.5个月大婴儿的匹配能力.
当然，父母已经知道婴儿可以“读”对方就好了，正如这部轰动一时的YouTube视频所证明的那样，17个月大的双胞胎兄弟参与了一些激烈的婴儿唠叨.
As an AI language model, I do not have a native language, but I can provide a translation of the text in Chinese:
No words? No problem. They may not be able to speak yet, but research shows that babies can recognize each others emotions and correctly match happy or sad baby sounds with appropriate facial expressions as early as 5 months old. For parents, it is well-known that babies are very attuned to emotions, as Ross Flom, associate professor of psychology at Brigham Young University and co-author of this new study – the first to investigate infants “peer matching” abilities – tells Todays Parent. The study was published in the journal Infancy. “This highlights how sensitive infants are to our communicative intentions,” Flom says. “They really can understand how we are saying something, so if you talk to a young baby, they may not fully understand what you are saying, but they will definitely understand how it is being conveyed.” Researchers were not surprised by the results. Studies have shown that babies can match the emotions of adults aged 7 months and younger. But so far, few have studied babies perceptions of other babies emotional expressions. Forty babies participated in the study: half were 3.5 months old and the other half were 5 months old. (In an interesting aside, researchers note that some babies data had to be excluded due to “over-excitement,” “falling asleep,” and other issues. “We were a little indulgent or capricious,” Flom says.) During the experiment, babies sat in front of two monitors. One person showed a video of a happy, smiling baby, while the other played a clip of a second sad, frowning baby. Then, a happy or sad baby audio was played. The audio in both videos did not match the babies lip movements. When hearing the “happy” audio, 5-month-old babies looked at the baby video for longer and had positive facial expressions. Similarly, when hearing the sad babys voice, 5-month-old children were able to match “negative vocalizations” with the sad, frowning baby video. Researchers did not find matching abilities in 3.5-month-old babies in this study. Of course, parents already know that babies can “read” each other, as evidenced by the viral YouTube video of 17-month-old twin brothers engaging in some intense baby talk.