The present study examined whether forward and backward serial recall
performance reflects different codes, or different levels of processin
g complexity. One hundred twenty-two participants saw sequences of 2 t
o 9 letters (phonologically similar or dissimilar) for 1 second each i
n the center of a computer screen, and recalled the letters in forward
or backward order. Participants correctly recalled more when letters
were phonologically dissimilar, and when recall direction was forward.
No interaction was found between direction of recall and phonological
similarity, which suggests that a phonological code was used for both
forward and backward recall. Also, forward and backward recall did no
t differentially predict SAT performance, which suggests I:hat forward
and backward recall required a similar level of processing complexity
.