26. capacity of short-term memory (i. e. the magic number) is and it can be increased by
a. 5-9 items/digits: chunking
b. 1-5 items/digits: chunking
c. 1-5 items/digits: encoding
d. 5-9 items/digits: encoding

Psychologists often talk of the magical number "7" - so it is generally assumed that we can keep 7 (more or less, so 5-9 is the correct answer) items in our short term memory - we know this as a result of many experiments.

we can increase this by chunking, so for example "7 8 9 5 3" is harder to remember than "78 95 3" - try it yourself!

the answer is a)

Yep i just took this test