If confirmed by future replications, our study will provide a
behavioral paradigm for the assessment of the potential of psy-
chiatric drugs to induce plasticity. In particular, the AP task may
be useful as a behavioral correlate. If further studies continue to
reveal specificity of VPA to the AP task (or to tasks on which train-
ing or intervention is provided), critical information will have
been garnered concerning when systematic drug treatments may
safely be used to reopen neural plasticity in a specific, targeted
way.