Encoding - primarily acoustic, but can be stored in different ways. Baddely's study involved four different conditions: acoustically similar (55% accuracy), acoustically dissimilar (75% accuracy), semantically similar and semantically dissimilar (slight detrimental effect). Participants were asked to recall five words in the correct order immediately after hearing the words. Encoding of STM is primarily acoustic.
Capacity - limited capacity. Baddely measured the reading speed of participants. Then they were presented five words taken from one of two sets: one-syllable/polysyllabic and asked to write the words in serial order immediately after. Participants could recall as many words as they were able to articulate in 2 seconds. Immediate memory span is 2 seconds articulation.
Duration - 15-30 seconds. Can be lengthened with rehearsal. Peterson and Peterson showed participants a consonant trigram. Interference task (counting backwards in threes) lasted for different intervals, then the participants were asked to recall the trigram. After 3 seconds, 80% accuracy, after 18 seconds, >10% accuracy. STM information decay worsens over time.
Memory is lost from STM through displacement.
Comments
No comments have yet been made