This experiment, conducted in Canada, confirmed the importance of singing to babies and the positive effects that familiar songs have on them.
Singing familiar songs to a distressed baby brings comfort—more so than unfamiliar songs or expressive talking. Thus singing to babies plays an important role in creating the parent-child relationship. A repertoire of familiar songs sung together can be a source of comfort in moments of distress.
In an experiment conducted in Canada, 136 babies aged eight or 10 months were videoed as a parent provided comfort by singing a familiar song, singing an unfamiliar song or talking expressively. Each parent was asked to play with the child for two minutes, then present a blank face to the child (the “still face procedure”) for one minute (or less if the child started getting really upset), then reunite with the child for two minutes by means of singing or speaking.
The video recordings showed that, particularly in the first 30 seconds, the babies paid more attention to the parent, smiled more and showed less distress (e.g. crying, frowning, frustration) when the parent sang a song that was familiar. Second best was an unfamiliar song, and least effective was speaking, even with much expression.
The researchers also tested skin conductance, a measure of the babies’ stress levels. The “still face” procedure increases stress in babies, and their skin conductance rises. By this measure, talking was least effective in reducing stress levels, an unfamiliar song was the most effective, and a familiar song was somewhere in between. This result presumably occurred because in addition to being reassuring, a familiar song also excites the baby (but in a positive way).
Making sounds in response to an infant’s distress is a common response as a supplement to physical closeness—and not just in humans. Singing to infants is a universal human practice. Typically, songs are more stable in pitch level and tempo, whilst speech is highly variable in form and content. Similarly, using music as a source of comfort is a universal human characteristic at all ages. Toddlers typically sing spontaneously when playing alone or going to sleep on their own.
Infants are surprisingly good at remembering tunes. Newborns respond to music they heard while in the womb. Two-month-olds recognise tunes. At six months, a baby will respond to a familiar tune even when it’s presented at a different pitch. Both adults and children remember a tune better if they sing it (tra la la) rather than just listen to it played on an instrument.
Familiar songs have a particular social significance for infants. Five-month-olds look longer at a stranger if she sings a familiar song rather than an unfamiliar song (as in the experiment reported here), but only when they learned the song from their mother, and not when they learned it from a toy.
Header photo: Ross Burton. Creative Commons.
Cirelli LK & Trehub SE (2020), Familiar songs reduce infant distress, Developmental Psychology
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