Final answer:
Gustav should use semantic encoding to remember the item 'bananas' from a grocery list, which involves deep processing of the meaning of the word and relating it to his own experiences for better recall.
Step-by-step explanation:
The question addresses the most effective way Gustav should encode the item bananas in his memory when remembering a grocery list. Based on research by Craik and Tulving on the levels of processing, the best way for Gustav to encode the word 'bananas' is through semantic encoding. This involves a deeper level of processing by focusing on the meaning of the word and its relevance to himself.
Instead of simply repeating the word or visualizing the typical appearance of bananas, Gustav could think about the various ways he enjoys bananas, perhaps in a favorite recipe, or reflect on a memorable moment that involved bananas. This self-reference effect helps create a personal connection with the item, which enhances memory recall. Additionally, creating a semantic link to other related concepts or experiences can strengthen Gustav's ability to remember the bananas when he is shopping.