Exam 7: Memory

Why do people sometimes fail to remember an uncommon word but have a feeling that it is on the "tip of the tongue"?

Many movies use product placement.For example, the main character in a movie may drink only Dr.Pepper.Companies pay for product placement because they assume that it increases the likelihood that audience members will later buy the product.If a person's shopping is unconsciously influenced by the appearance of a product in a movie, this effect is likely due to existence of the item in memory.

Sam has to buy his girlfriend something for her birthday.One of the main reasons why Sam could forget to do this is ________ due to _.