化学中讲的携带效应(Carry-over effect
化学中讲的携带效应(Carry-over effect
What are carry-over effects?A carryover effect is an effect that "carries over" from one experimental condition to another.Whenever subjects perform in more than one condition (as they do in within-subject designs) there is a possibility of carryover effects.For example,consider an experiment on the effect of rate of presentation on memory.Subjects are presented with a list of words and asked to recall as many words as they can.In one condition,the words are presented one word per second; in the other condition,the words are presented two words per second.The question is whether or not having performed in one condition affects performance in the second condition.Perhaps learning the first list of words will interfere with learning the second list because it will be hard to remember which words were in each list.Or maybe the practice involved learning one list will make it easier to learn a second list.In either case,there would be a carryover effect:performance on the second list would be affected by the experience of being given the first list.Assume two experimental conditions:A1 and A2.
Half the subjects perform in Condition A1 first and then in A2; the other subjects perform in Condition A2 first and then in A1.The following table of means shows "symmetric carryover effects."
我见过的是因为液体蒸发等原因,将一些液态小滴弹到气体中
比如家中烧鱼时常加些料酒,就利用了携带效应,带腥味的胺类物质溶于酒精,酒精易挥发,便将这些一起带出去了,从而去除了腥味。 这是我看的文献中携带效应的图,表现的是先引入5分钟甲醇,再引入20分钟1%硝酸后,时间变化对测定的影响。我想问携带效应和记忆效应有什么区别吗?