To help Carlos learn to ride his bike without training wheel…

To help Carlos learn to ride his bike without training wheels, his dad runs alongside the bike with his hands on the handlebars and the back of the seat, while Carlos pedals. After a while, his dad only places his hand on the back of the seat; and later, his dad just runs alongside the bike without touching the bike, unless Carlos becomes unsteady. According to Jerome Bruner, Carlos’s dad is using which technique to help Carlos learn to ride his bike?