Study: Names change how an infant's memory encodes objects

A new study shows that naming conventions will change how infants represent objects in their memories.

child playing with stuffed animals
  • Humans begin to encode for categories and individuals at an early age.
  • A new study shows that language, specifically naming conventions, plays a role in how infants' memories encode objects either within groups or as individuals.
  • Even before we speak our first words, the way words are used around us begin to shape our representation of the world.

The human mind brims with fascinating mental tools. One such tool is our ability to perceive and categorize the world for both groups and individuals. Because we are so accustomed to our minds, that may not seem remarkable but it's quite something. Even more remarkable, we develop this capacity at an incredibly young age.

Children understand, for example, that bunnies have long ears, fast feet, cotton-ball tails, and fluffy coats. But a child also understands that Sir Flops is both a bunny but an individual. He has a star-shaped patch on his rump, likes broccoli more than carrots, and enjoys a good scratch behind the ears. Children manage this distinction before they have acquired an encyclopedia's worth of names and details to check and cross-reference to ensure proper mental categorization. But how?

Drs. Alexander LaTourrette and Sandra Waxman, psychologists at Northwestern University, have proposed that language, specifically naming conventions, determine how infants encode objects into memory—whether as part of a group or as an individual. Their new study, published in the Proceedings of the National Academy of Sciences, suggests they are on to something.

A parade of boffs

An image showing the stuffed animals introduced during the training phase followed by the new ones introduced in the test phase.

(Photo: Alexander LaTourrette and Sandra Waxman/PNAS)

To test their hypothesis, LaTourrette and Waxman did what all good scientists do: set up an experiment. They enlisted the help of 77 infants, each between eleven-and-a-half and twelve-and-a-half months old, and trained them to recognize stuffed animals. They showed the infants a parade of stuffed animals and introduced them with a novel name.

During this training phase, the infants were divided into three groups. The first group, the consistent name group, was introduced to the stuffed animals with a single signifier. For example, even though the stuffed animals were a piglet, kitten, duckling, and panda, each one would be referred to as a "boff."

The second group, the distinct name group, was also presented with the four stuffed animals. But this time, each one was given a unique signifier. The kitten would be called a "boff," but the duckling an "etch," the piglet an "arg," and the panda a "dov."

The third group was enlisted as the control. For this group, each stuffy introduction was paired with a monotone voice. This is because tone, unlike names, has been shown to not facilitate categorization.

The researchers' goal was to determine how each naming convention encoded the stuffed animals within the infants' memories over several training trials. When the stuffies were introduced as a "boff," then the infants' memories should encode them as a unified category. Like in our bunny example above, they would perceive the commonalities of "boffness"—big round eyes, soft fury, and cuddly tummies.

Conversely, when the stuffies were introduced by distinct labels, then the infants' memories should encode for individuation. As with Sir Flops, they would perceive distinguishing features and tag those in their memory for later recall—etch has yellow fur and wings while arg sports pink fur and a snout.

A boff by any other name?

Of course, LaTourrette and Waxman couldn't ask the infants how they remembered their colorful compatriots. So, they utilized a recognition memory test to find out. The researchers reintroduced the infants to the stuffed animals from the previous training alongside a never-before-seen fuzzy friend. The researchers then recorded the children's gazes.

They theorized that if infants stared equally at both "boffs," then they recognized the commonalities between them and had encoded for a category. However, if the infants stared longer at the new toy, that indicated that the infant recognized the original object and was spending time memorizing the new, individualized, object.

That's exactly what they found. Infants from the consistent name group stared at both stuffed animals for equal time, suggesting they recognized the commonalities at the expense of distinctive features. The distinct name group recognized the individuals more readily and turned their attention to the new stuffy. The control group only recognized the more recent stuffed animal.

"Our findings reveal a powerful and sophisticated effect of language on cognition in infancy: the way in which an object is named, as either a unique individual or a member of a category, influences how [twelve-month-old] infants encode and remember that object," the researchers write. "Hearing a consistent name applied to a set of objects focuses infants on the commonalities among them, while hearing distinct names applied to the same objects focuses infants on the uniqueness of each object."

The researchers expressed hope that their research would help cognitive psychologists gain a deeper understanding of how names influence people, from infancy to adulthood, in their conceptual representations. They also hope that this evidence opens further investigations, such as how familiar nouns (rather than novel names) influence infant representations.

They conclude, "Even a single naming episode can have a lasting impact, influencing how infants encode that object, represent it in memory, and remember it later."

‘Designer baby’ book trilogy explores the moral dilemmas humans may soon create

How would the ability to genetically customize children change society? Sci-fi author Eugene Clark explores the future on our horizon in Volume I of the "Genetic Pressure" series.

Surprising Science
  • A new sci-fi book series called "Genetic Pressure" explores the scientific and moral implications of a world with a burgeoning designer baby industry.
  • It's currently illegal to implant genetically edited human embryos in most nations, but designer babies may someday become widespread.
  • While gene-editing technology could help humans eliminate genetic diseases, some in the scientific community fear it may also usher in a new era of eugenics.
Keep reading Show less

Massive 'Darth Vader' isopod found lurking in the Indian Ocean

The father of all giant sea bugs was recently discovered off the coast of Java.

A close up of Bathynomus raksasa

SJADE 2018
Surprising Science
  • A new species of isopod with a resemblance to a certain Sith lord was just discovered.
  • It is the first known giant isopod from the Indian Ocean.
  • The finding extends the list of giant isopods even further.
Keep reading Show less

These are the world’s greatest threats in 2021

We look back at a year ravaged by a global pandemic, economic downturn, political turmoil and the ever-worsening climate crisis.

Luis Ascui/Getty Images
Politics & Current Affairs

Billions are at risk of missing out on the digital leap forward, as growing disparities challenge the social fabric.

Keep reading Show less

Columbia study finds new way to extract energy from black holes

A new study explains how a chaotic region just outside a black hole's event horizon might provide a virtually endless supply of energy.

Credit: NASA's Goddard Space Flight Center
Surprising Science
  • In 1969, the physicist Roger Penrose first proposed a way in which it might be possible to extract energy from a black hole.
  • A new study builds upon similar ideas to describe how chaotic magnetic activity in the ergosphere of a black hole may produce vast amounts of energy, which could potentially be harvested.
  • The findings suggest that, in the very distant future, it may be possible for a civilization to survive by harnessing the energy of a black hole rather than a star.
Keep reading Show less
Mind & Brain

A psychiatric diagnosis can be more than an unkind ‘label’

A popular and longstanding wave of thought in psychology and psychotherapy is that diagnosis is not relevant for practitioners in those fields.

Scroll down to load more…
Quantcast