Stability of thinking.
How consistent we're students in their use of relational or computational approaches across the three groups of problems?
Students we're classified into three groups:those students who used relational strategies across all three groups of problems (SR-Stable Relational);those students who used only arithmetical or computational approaches across all three groups of problems (SA-Stable Arithmetical); and those students whose thinking was not consistent across the three groups (NS-Not Stable).The following rule was used.