This experiment recorded forward and backward digit span recollection, a measure of
short term memory which has been demonstrated to correlate with I.Q (Jensen, 2000).
Thirty undergraduate students, 9 male and 21 female of mixed age, were tested
individually with 2 sets of 16 nominal strings, ranging from 3 to 8 digits in length.
Participants repeated the first set of strings in the order they had heard them, and reversed
the order of the second set. Their scores on each set of strings were measured and
collated. This experimenter recorded a score of 26.The group mean was calculated to be
18.73. Using kurtosis and skew analysis, the normality of the groups distribution was
confirmed and the groups SD calculated to be 4.60. A z score of 1.58 was calculated by
this experimenter. This was transformed to an I.Q o123.73. Additional data more
precisely correlating I.Q with digit span, and a wider sample of digit span SD and mean’s
would be required to infer the significance of the data recorded