Employs a rigorous methodology
Experimental design used repeated measures (where all pps were exposed to both conditions)
Allowed for direct comparison btw conditions while minimising individual differences
High levels of control were maintained throughout while the IV was manipulated
Counterbalancing was used to overcome the limitations of repeated measures by reducing the concern of order effects
Unrelated word lists ensured retrieval was unaffected by previously formed word associations
G+B confirmed the divers were Proficient in diving to avoid potential confounding variables related to discomfort/anxiety underwater
Replications of this study reveal consistent findings, enhancing confidence in its methodology + conclusions
Suggests the experiment is high in both internal + external validity