Infant Reach Training Affects Object Exploration 12 Months Later


Scientists have known that infants’ early learning experiences may positively affect later development through processes called developmental cascades. For example, walking and fine motor skills have been associated with vocabulary size and later language development.

These cascades have been commonly theorized, but until now evidence supporting them has been largely correlational.

A new study demonstrates a powerful link between training infants to reach for an object and later heightened interest in objects and focused attention. Says Amy Needham, professor and chair of psychology and human development at Vanderbilt University’s Peabody College of education and human development:

“This research tells us that babies are having experiences early in life that they build on and that provide a foundation for further learning.”

For the study, researchers facilitated parent-guided reaching training for 36 3-month-old infants for 10 minutes a day for two weeks. Reaching behavior typically does not emerge until a child is between 4 and 6 months old.

Sticky Mittens

In the training, half of the infants were outfitted with “sticky mittens”, mittens with Velcro that enabled blocks also covered with Velcro to adhere to their hands. Parents were instructed to encourage their children to reach for the blocks.

The control group wore mittens without Velcro, and the blocks, covered with tape, were touched to their hands without adhering.

The babies who had used the sticky mittens showed more visual interest in a toy and were less distracted during play. They also grasped and rotated the toy for longer periods of time than the other infants.

The results were still in evidence a year later when 25 of the infants were tested again. Using the Early Childhood Behavior Questionnaire, the researchers also learned that the sticky mittens group had higher attention focusing ratings than the other infants.

“It is amazing to think that roughly two hours of additional experiences with successful reaching at age 3 months led to changes in the infants’ exploration and attention focusing skills after 12 months,”

says lead author Klaus Libertus, research assistant professor at the University of Pittsburgh.

“This demonstrates the profound impact that early experiences can have on a child’s continued development. In a sense, the children just kept on providing themselves with new experiences and opportunities once the training sessions ended.

These findings support the notion of developmental cascades and suggest that motor training may also foster the development of social and cognitive skills,”

says Needham, who began the research while at Duke University.

Because reduced grasping activity and delays in motor skill development have been associated with risk for developmental disorders, the findings may have implications for autism and Down syndrome research.

Libertus, K., Joh, A. S. and Needham, A. W.
Motor training at 3 months affects object exploration 12 months later
Developmental Science. doi: 10.1111/desc.12370