Case studies (STM) Cognitive psychology

Evidence for the existence of two seperate memory storesAim: investigate the existence of two seperate memory storesMethod: Participants were presented with a list of words, one at a time which they then had to recall either immediately or after an interference task. The frequency of recall for each word was recorded

Case study of HMSuffered years of epilepsy following a childhood accident. Had surgery to help control his epilepsy but his memory was impaired

Aim: To investigate the capacity of LTMMethod: Lists of digits were read to participantsthen required to repeat the list back in the correct order.Lists started with three digitsand increased in length by one digit at a time.

Aim to investigate the duration of the STM.Method: Participants were presented with trigrams of consonants and asked to remember them.To prevent rehearsal, participants were asked to count aloud, backwards and in threes for intervals of 0,3,6,9,12,15 or 18 seconds and then had to recall the trigram

Aim: To investigate the encoding in STM by studying acoustic confusion errorsMethod: Participants were briefly shown a series of random sequences of six consonants in rapid succession on a screenParticipants were asked to write down the letters in the correct order Letter sequences were either acoustically similar or dissimilar. Participants experienced both conditions