Individuals with high math anxiety demonstrated smaller working memory span
s, especially when assessed with a computation-based span task. This reduce
d working memory capacity led to a pronounced increase in reaction time and
errors when mental addition was performed concurrently with a memory load
task. The effects of the reduction also generalized to a working memory-int
ensive transformation task. Overall, the results demonstrated that an indiv
idual difference variable, math anxiety, affects on-line performance in mat
h-related tasks and that this effect is a transitory disruption of working
memory. The authors consider a possible mechanism underlying this effect-di
sruption of central executive processes-and suggest that individual differe
nce variables like math anxiety deserve greater empirical attention, especi
ally on assessments of working memory capacity and functioning.