participant decided whether or not it had been in the original
series and pressed the ‘yes’ or ‘no’ response button as appropriate,
as quickly as possible. This was repeated two further times
with different stimuli and probe digits. Mean reaction times were
measured in milliseconds and the accuracy of responses to both
original and novel (distractor) stimuli were recorded as percentages
that were used to derive a ‘percentage greater than chance
performance ’ score.
Delayed word recognition: The original words plus 15 distractorwords
were presented one at a time in a randomized order.
For each word, the participant indicated whether or not he or she
recognized it as being included in the original list of words by
pressing the ‘yes’ or ‘no’ button as appropriate and as quickly
as possible. Mean reaction times were measured in milliseconds
and the accuracy of responses to both original and novel (distractor)
stimuli were recorded as percentages that were used to
derive a ‘percentage greater than chance performance’ score.
Delayed picture recognition: The original pictures plus 20
distractor pictures were presented one at a time in a randomized
order. For each picture, participants indicated whether or not it
was recognized as being from the original series by pressing the
‘yes’ or ‘no’ button as appropriate and as quickly as possible.
Mean reaction times were measured in milliseconds and the
accuracy of responses to both original and novel (distractor)
stimuli were recorded as percentages that were used to derive a
‘percentage greater than chance performance’ score.