Figure 2.

Mental folding trial. Children were asked to imagine folding the shape at the top, as directed by an arrow and a dashed fold line, and to then select one shape at the bottom which showed the shape after the fold.

Mental folding trial. Children were asked to imagine folding the shape at the top, as directed by an arrow and a dashed fold line, and to then select one shape at the bottom which showed the shape after the fold.