In a memory study, the experimenter reads the same list of words to two groups. She asks group A to count the letters in each word, and she asks group B to focus on the meaning of each word for a later memory quiz. During a recall test, participants in group B recall significantly more words than participants in group A. Memory researchers attribute this effect to differences in

This effect is due to the differences among the levels of processing.

Explanation:

The depth of processing involved in memory, shaped the model by Craik and Lockhart, 1972, stating that the deeper information is processed, the longer a memory trace will last, this is called the levels of processing, defining depth as "the meaningfulness extracted from the stimulus rather than in terms of the number of analyses performed upon it.” by Craik (1973).

a would be the answer

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