Peterston and peterson

• What is chunking in memory research?

  Grouping sets of information together
• What does the research on the duration of the sensory register focus on?

  It describes the duration of sensory memory
• Who conducted the research on the duration of STM?

  Margaret and Lloyd Peterson
• How many students were tested in Peterson and Peterson's study?

  24 students
• What was the purpose of counting backwards in the STM study?

  To prevent mental rehearsal of the three
• What were the varying retention intervals used in the study?

  3, 6, 9, 12, 15, or 18 seconds
• What was the average recall after 3 seconds in the study?

  About 80%
• What was the average recall after 18 seconds in the study?

  About 3%
• What did Peterson and Peterson's findings suggest about STM duration?

  STM duration may be about 18 seconds
• What is a limitation of Peterson and Peterson's study?

  • Stimulus material was artificial
  • Lacked external validity
  • Does not reflect everyday memory activities
• Why is recalling consonant syllables considered a limitation?

  It does not reflect meaningful memory tasks
• What does high external validity mean in the context of the study?

  The findings can be generalized to real-life situations
• What type of material do we sometimes try to remember that is fairly meaningless?

  Phone numbers