Short-term memory span of 7 plus or minus 2 refers to

Short-term memory span of 7 plus or minus 2 refers to
 
  a. the number of items that can be held in memory.
  b. the number of chunks that can be held in memory.
  c. the length of time information can be held in memory.
  d. the length of time to transfer information into long-term memory.

Question 2

What kind of task requires people to learn to identify stimuli that vary along a single, sensory continuum?
 
  a. digit span c. absolute judgment
  b. memory span d. relative judgment

Question 3

Wickens' study on release from proactive interference by introducing a new category of words suggests that STM can be influenced by
 
  a. sensory codes. c. visual codes.
  b. semantic codes. d. phonemic codes.

Question 4

Wickens' study on release from proactive interference showed that recall could be improved by
 
  a. giving more practice trials. c. shifting to a new class of words.
  b. presenting items at a slower rate. d. encouraging more rehearsal.