Final answer:
Answering if 'BOOK' contains all lowercase letters requires structural encoding, which is the recognition of physical features. It is different from semantic encoding, which involves encoding the meaning of words.
Step-by-step explanation:
If you are presented with the word BOOK and asked to determine if it contains all lowercase letters, this requires the use of structural encoding. Structural encoding is the shallowest level of processing and involves noticing the physical features of the stimulus. In this case, you would focus on the form of the letters to determine whether they are in lowercase. This is contrasted with semantic encoding, which refers to the encoding of words and their meaning, a deeper level of processing that was demonstrated by William Bousfield in 1935. Bousfield's experiment showed that when people memorize words with associated meanings, even when presented randomly, they tend to recall them in categories based on their meanings, not their structural features like whether they were uppercase or lowercase.