According to the levels of processing, deciding whether an umbrella would be useful to pack for a trip, would most improve the ability to recall the word "umbrella". This model focuses on the depth of processing in memory.
The 'levels of processing' is a model developed by the cognitive psychologists F. Craik and R. Lockhart in 1972.
This model (levels of processing model) puts focus on the depth of processing developed for memory tasks.
This model can be used to predict how information is processed, where memory can be considered as an outcome of processing information.
Learn more about the levels of processing here:
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