Can You Lose Knowledge From Not Using It?

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Discussion Overview

The discussion revolves around the concept of whether individuals can "lose knowledge" in a subject if they do not engage with it regularly. Participants explore this idea in the context of mathematics and physics, considering implications for learning, retention, and teaching.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants suggest that not practicing a subject regularly can lead to a loss of confidence, though they argue that the underlying knowledge remains intact.
  • Others propose that the "use it or lose it" principle applies particularly to subjects like physics and higher-level mathematics, with some attributing their retention of knowledge to teaching or tutoring.
  • One participant notes that while immediate recall may be possible, longer-term retention diminishes without review, emphasizing the importance of periodic review for memory retention.
  • A comparison is made between knowledge retention and physical fitness, suggesting that skills in both areas require regular practice to maintain proficiency.
  • Some participants question the motivations of professors teaching outside their research areas, implying that teaching may serve as a method to reinforce their own knowledge.

Areas of Agreement / Disagreement

Participants express varying views on the extent to which knowledge can be lost, with some agreeing that regular practice is necessary for retention while others emphasize that the knowledge itself does not disappear entirely. The discussion remains unresolved regarding the mechanisms of knowledge retention and the implications of teaching as a reinforcement strategy.

Contextual Notes

Participants reference anecdotal experiences and suggest scientific studies related to memory recall, indicating a potential gap in empirical evidence within the discussion.

Holocene
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Is it common to sort of "lose knowledge" in a particular subject if you don't use it for a while?

For instance, when studying some math, I had to go back and review some past chapters even though I correctly answered all the review questions associated with that chapter at a prior date.
 
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If you don't practice something regularly, you will lose confidence in it. I don't think you can really forget what you learned. You will have a sense of familiarity, but to become proficient again you have to practice.
 
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I think that the loose it or lose it attitude applies to physics and definitely to math above the pre-calculus level. I think the only reason I am still proficient in intro-physics is because I am a tutor for it.
 
Well certainly, you don't remember everything you learn.
If you turn a page in a book you can remember what you just read, but come a month later and someone asks you what happened on page 97 you'll have no idea.

Review once in a while and you'll retain a much higher percentage of what you learned for a much longer time. If you're really interested there have been scientific studies about memory recall, maybe google for them.
 
Of course. Relate it to exercising ... say you're in shape atm and can run miles, do you think you'll be able to do that w/o having exercised a year down the road? Same goes for knowledge.
 
why do you think professors will voluntariy teach classes in things they don't do research in?
 
CPL.Luke said:
why do you think professors will voluntariy teach classes in things they don't do research in?

At my department, they also give the classical physics TA assignments to us first years to help us study for our qualifier. Seems like teaching something is an excellent way to not forget it.
 

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