comma or dash with apposition: anorexia nervosa - an eating disorder

[audiolaik]

Hello,

Which of the following is correct?

1) Anorexia nervosa--an eating disorder characterised by an obsession with losing weight--is common among young gymnasts and ballet dancers.

2) Anorexia nervosa, an eating disorder characterised by an obsession with losing weight, is common among young gymnasts and ballet dancers.

Thanks!

 

[Madrid829]

You should use the comma.

We use a lot of dashes in shorthand and informal writing (especially on the internet), and sometimes a dash is appropriate if you're just indicating a small piece of information as an aside, but in this case you are qualifying "anorexia nervosa". And for formal writing, when in doubt you should stick with the comma.

 

[Lexiphile]

Number 2 is correct.

Number 1 is incorrect because a) it's the wrong place to put a dash and b) that's not a dash anyway; it's a hyphen. A dash must have space before and after.
Nervosa-An sounds like an American girl's name.

 

[audiolaik]

Sorry for using hyphens instead of dashes.

I've read somewhere not to put a space before or after the dashes

 

[Madrid829]

There aren't spaces per se. Rather, there is a specific symbol that is slightly different than a hyphen:

Hyphen: -
Dash: –

Hyphen: Low-calorie
Dash: I started screaming–loudly–and scared everyone in the room.

 

[audiolaik]

I've found the following sentence in a book on punctuation:

If you want to emphasise an example, a definition, or a contrast, you can use a dash or dashes.

p.s. While writing the sentence, I hit the hyphen key twice;yet the result is rather poor.

 

[Lexiphile]

If you want to emphasise an example, a definition, or a contrast, you can use a dash or dashes.

Yes, indeed, you can. If your sentence is already cluttered with commas, then dashes, or parentheses even, can be used to set off these things. But your sentence has no other commas and this is a simple apositive. Dashes are not appropriate.

And by the way, I think the rule about "no spaces" is silly. As you can see from Madrid's examples, it's not easy to tell the difference between a dash and a hyphen. And most computer keyboards don't have a dash anyway (which is why you have used a double-hyphen in your correction). I still think spaces look better, particularly when you are using a variable-pitch font.

 

[audiolaik]

So, if you were presented with the two examples, you would choose the comma version, right?

 

[Lexiphile]

So, if you were presented with the two examples, you would choose the comma version, right?

Right!
And I would also spell appositive with 2 p's.

 

[audiolaik]

Thank you for your help and patience, especially when dealing with such fussy language learners as I am

 

[Packard]

Number 2 is correct.

Number 1 is incorrect because a) it's the wrong place to put a dash and b) that's not a dash anyway; it's a hyphen. A dash must have space before and after.
Nervosa-An sounds like an American girl's name.

MicroSoft Word converts two hyphens "--" into a single dash. I suspect that is the case in this instance.

 

[audiolaik]

It seems mine doesn't

 

[Packard]

It seems mine doesn't

It does not convert the "--" to a dash until you add a word after it. Until that time is leaves it as "--".

 

[audiolaik]

How clever!!! I didn't know that!

Thanks!

p.s. It does work now.

 

[panjandrum]

lk—gh

Above is the result of typing two hyphens together in OpenOffice.

There are two slightly different conventions for using a dash. The more modern one is to put white spaces at both ends of a dash, while the older style uses no white spaces at all, but writes the dash solid next to whatever precedes and follows it.
Source

Follow the house style of wherever you are writing for.

 

[audiolaik]

Thanks a lot!!!

 

[ewie]

Personally I'm a big fan of the 'swung dash' ~ this thing ~ but wouldn't recommend it for writing anything formal. It gets round the problem of not having a proper dash on one's keyboard, and is okay for internet-stuff where one's punctuation isn't being scrutinized by hordes of sticklers