Kinesiology 3480A/B Lecture Notes - Interference Theory, Cognitive Psychology

62 views3 pages
Brown-Peterson Task
- classic study
- as long as it is rehearsed, it will persist in STSS; but other stimuli distract
- how long can unrehearsed info persist in STM? AND are there interference effects in the
STM? (their research objectives)
- participants given a trigram, then asked to count backwards from some random number
(prevents rehearsal; distractor task); then asked to recall the trigram
- seems simple but it is not
- speaks to how fleeting (short-term) it is and how susceptible it is to interference effects
Typical Results of the Brown-Peterson Task
- graph: recall accuracy
- x-axis - how long before you were asked to recall (backward counting task length)
- monotonic/decreasing ability to recall the trigram as a function of the increasing delay
interval
- provided them with a basis of the interval for how long info can last in STM
- 50% (reliable recall) - around 3 sec
- found: info that is unrehearsed can persist in STM for around 3 seconds
- not as fleeting as STSS (300ms)
Brown-Peterson Task
- another thing they found as a consequence of their results
- found: linear reduction in recall accuracy as a function of number of recall trials (more trials
= worse recall)
- why did this performance decrement occur?
- anecdotal finding from original study - created a second study for why this occurred
- participants only did 4 trials
- control = same 4 trials as first study (always presented and asked to recall a trigram)
- experimental = same thing, but on 4th trial they were asked to recall 3 numbers instead of
a trigram
- switched the semantic category associated with the to be recalled stimuli on the 4th
trial
- graph: actual data
- control - same result as in first experiment
- experimental - mirrors performance of control, 4th trial goes back up to almost
100% recall accuracy
- speaks to the semantic/categorical nature associated with short term/working memory
- categorical information is susceptible to interference effects
- found: STM susceptible to proactive interference (what you are currently trying to learn is
impaired by stuff that you previously learned)
Unlock document

This preview shows page 1 of the document.
Unlock all 3 pages and 3 million more documents.

Already have an account? Log in

Document Summary

As long as it is rehearsed, it will persist in stss; but other stimuli distract. Participants given a trigram, then asked to count backwards from some random number (prevents rehearsal; distractor task); then asked to recall the trigram. Speaks to how fleeting (short-term) it is and how susceptible it is to interference effects. X-axis - how long before you were asked to recall (backward counting task length) Monotonic/decreasing ability to recall the trigram as a function of the increasing delay interval. Provided them with a basis of the interval for how long info can last in stm. 50% (reliable recall) - around 3 sec. Found: info that is unrehearsed can persist in stm for around 3 seconds. Another thing they found as a consequence of their results. Found: linear reduction in recall accuracy as a function of number of recall trials (more trials. Anecdotal finding from original study - created a second study for why this occurred.

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
Booster Classes
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Class Notes
Textbook Notes
30 Verified Answers
Study Guides
Booster Classes