... was carried out using two group of ten males, aged 16-18, using opportunity sampling within the school common room, and asked each member to commit as many trigrams as possible to memory for one minute, from a list of twenty compiled previously. I then allowed ten out of the twenty participants a 'rehearsal time' of 20 seconds, which involved the member on his own, with no other contact with any other participants, going over the trigrams in his head. I then asked each participant to recall as many trigrams as possible. The participants were selected one at a time, whereby once one had finished reciting his trigrams, another was selected and asked to take part in the experiment. The second group of participants were approached in the same way, but after being allowed one minute to commit the trigrams to the STM, they were asked to hand back the sheet, ...

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