言語的作動記憶容量を測定

Working memory is a specialized memory system that temporarily holds information for short durations, allowing it to be studied, manipulated, and transferred to other cognitive systems. Unlike long-term memory, working memory has very limited capacity and is selective, admitting only restricted amounts of information at a time to serve its active role.

The verbal list paradigm measures working memory capacity by having researchers read word lists of varying lengths to participants, who then recall the words in sequential order. Recall accuracy—the number of words repeated back correctly in the right order—serves as the dependent variable, revealing the limits of verbal working memory span.

Words at the beginning of a list are mentally rehearsed more than words in later positions, resulting in higher recall accuracy. This phenomenon is called the primacy effect. In contrast, words in the middle of longer lists have more interfering neighbors, making them harder to recall despite being heard before the final words.

The recency effect describes the high recall accuracy for words at the end of a list. Words heard most recently have few interfering neighbors in working memory, allowing them to be retrieved with greater accuracy than middle-position words, even when the list is long.

Verbal working memory span is identified by finding the longest list length for which a participant performed better than 75% correct across all word positions. This threshold represents the maximum capacity limit of that individual's verbal working memory system and indicates their span performance.

Working memory is engaged daily for tasks like recalling recipe steps or remembering new people's names. Memory span is included in many intelligence tests because it correlates reliably with IQ. It is also used with functional imaging to assess brain damage effects and detect degenerative diseases such as Alzheimer's.

Generate a master list of 210 common nouns, then create seven varied-length piles with five index cards each, ranging from three to nine words per list. Verify that no nouns repeat across lists or cluster into categories that would unintentionally ease recall, ensuring measurement validity.