Sitting in a very noisy restaurant, you are able to screen out all the other conversations around you so you can listen to the friend with whom you are conversing. This is an example of ______

After a researcher has formulated a research ______, he or she must reformulate it into a specific idea to be tested, called a(n) ______

Fill in the blank with correct word

Unless you repeat them, items placed in short-term memory are usually lost in less than__________

a) 2 seconds. b) 15 seconds. c) 60 seconds. d) 30 seconds.