"Milk, cereal, candy. "Your roommate begins reciting items as you get ready to leave to the store. He continues to list a few more items. Finally, he wraps up: "Spaghetti sauce, dish liquid, and ice- tea mix." You forget a few things, but the spaghetti sauce, dish liquid, and ice-tea mix are in the bag. Your memory for these items reflects the effect.

Recency effect

Explanation:in psycy, recency effect is the ability to remember or recognize recent information or items presented better. It works in the way that you can remember easily items you listed or purchased last . This effect gives us first hand knowledge of how the memory works.

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question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals