Jump to content

Number grades vs. Letter grades


Mike_G

Recommended Posts

I've been climbing for a few years, more seriously since I moved to central Oregon a couple years ago, and currently onsight in the mid to upper 5.10's. A friend asked if the number grades (up to 5.9) are pretty equivalent to an increase of one letter grade (above 5.10). I didn't really have a great answer, but it seems to me that the difference in difficulty between a 5.8 and a 5.9 is not four times as much as a 5.10a and a 5.11a.

 

So the question, basically, is whether most folks see the difference in number grades as the equivalent of one letter grade. This may be comparing apples and oranges, but just wondering what you all think.

 

Thanks,

Mike

Link to comment
Share on other sites

  • Replies 25
  • Created
  • Last Reply

Top Posters In This Topic

difference in difficulty between a 5.8 and a 5.9 is not four times as much as a 5.10a and a 5.11a

 

...difference in difficulty between a 5.8 and 5.9 is not four times less than that between 5.10a and 5.11a...

 

The only way you would be able to do math like this on ratings is if they were based on at least one measurable variable, which they are not. There is no mathematical basis behind ratings or the numbers used in them.

Link to comment
Share on other sites

difference in difficulty between a 5.8 and a 5.9 is not four times as much as a 5.10a and a 5.11a

 

...difference in difficulty between a 5.8 and 5.9 is not four times less than that between 5.10a and 5.11a...

 

The only way you would be able to do math like this on ratings is if they were based on at least one measurable variable, which they are not. There is no mathematical basis behind ratings or the numbers used in them.

 

Oh really. Well why do we even have ratings then? Obviously somebody thinks they correlate pretty well with changes in difficulty. Some negative folks around here...

Link to comment
Share on other sites

Naw, grades are bullshit. No way you can compare the difference, way too much "fuzz".

 

In the language of data management, climbing grades are an ordinal measure, like {strongly disagree, disagree, neither agree nor disagree, agree, strongly agree}. Everone gets confused because they're represented by numbers, so they look all scientific and measurable and stuff. They're not.

 

Grades are a first ascentionist's best guess of how hard a route was, nothing more (sometimes modified over the years by local consensus, sometimes not). Don't sweat it. If you're lucky, 5.11a is going to be harder than 5.10a, but beyond that, forget about quantifying it.

 

Modeling the effort required for various climbing moves - could this be the next frontier in biophysics? Inputs could include climber height, ape index, flexibility index, sweat gland efficiency, fear coping factor as well as route steepness, average (median/standard error) hold width, rock friction coefficient, etc. etc. Time for the geeks to really come out of the closet!

Geek_em8.gif

Link to comment
Share on other sites

i think there's so much variability in grades from place to place and route to route that it's hard to compare 5.8 jump to 5.9 and 5.10a to 5.11a.

 

recently i've glided up some 5.8 pitches and then climbed a 5.8 that had me whimpering for my mom. a few days after that enjoying some 5.10a and 5.9 pitches.

 

no matter how you want to try and quantify it in your own mind, there is no way to avoid the subjectivity in grades.

Link to comment
Share on other sites

That probably has more to do with the general rule that (for instance) the last 20% of the weight loss takes 80% of the effort, and vice versa. I had the same experience - I learned how to climb with little or no technique and could do 5.8. It took some technique and more strength to do 5.9. 5.10 meant going climbing on a regular basis. 5.11 requires refinement of technique and more strength. So I think the sensation that grades are exponentially harder has more to do with the climber and less with the climb. And hell, just enjoy it. There's a 5.10b that's been kicking my ass for months, and I felt like thumbing my nose at it because I could do the 5.10c next to it. grin.gif That's just the luck of the rating!

Link to comment
Share on other sites

How do you figure that Schneider is "weak"? I'm curious, because I think of hard OW climbing as being very physical. Wasn't Schneider the one who climbed those .12 OW pitches while trying to free Excalilber. AFAIK, they are unrepeated.

 

he's a scrawny guy with legs that look like an anorexic girl's arms, a little potbelly and stick thin arms with no muscles. he himself said that his climbing is all about technique and that he can barely do a dozen pullups.

Link to comment
Share on other sites

goodness.gif

iain, this is brilliant. Strangely enough, it's all clear now.

 

As for the idea of a "genetic threshold", it is simply the "nature" in the "nature vs. nurture" balance to which nearly all traits owe their current expression. Any science geek worth his salt would understand this...

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




×
×
  • Create New...