TITLE: The strategic nature of changing your mind


In two experiments, we studied how people choose to solve problems based on
both an initial and then a more considered evaluation of available
strategies. The experiments employed a computer-based paradigm where
participants solved multiplication problems using mental and calculator
solutions. In addition to recording responses and solution times, we
gathered data on mouse cursor movements. Participants¹ motor behavior was
revealing; although people rapidly initiated movement to the calculator or
answer box, they frequently changed their minds and went to the other box.
Movement initiation direction depended on problem difficulty and calculator
responsiveness. Ultimate strategy selection also depended on these factors,
but was further influenced by movement initiation direction. We conclude
that strategy selection at the interface is iterative, as revealed by these
differences between early cursor movement and eventual strategy
implementation. After rapidly initiating movement towards one strategy,
people carefully evaluate the applicability of that strategy in the current
context.