Michelle Is an 8-Year-Old Who Shows an Understanding of Seriation

Multiple Choice

Michelle is an 8-year-old who shows an understanding of seriation, class-inclusion, and conservation of number and amount but fails to understand other types of conservation problems.According to Piaget, what is the term for this behaviour and what does it indicate about Michelle's cognitive development relative to the average child?

A) perpendicular décalage, indicating that she is advanced
B) horizontal décalage, indicating that she is within the normative range
C) perpendicular décalage, indicating that she is somewhat delayed
D) horizontal décalage, indicating that she is severely cognitively disabled