39820
In [どうしたの？] the の is seeking explanation right?

What's the diffence between [どうしたの？] and [どうしたのか？] ?

both are casual speaking but is the first one more feminine?

I know the formal one would be [どうしたのですか？]

Thank you :)
CC BY-SA 3.0
2016-10-01T02:26:07.390
39595
2016-10-10T03:48:40.947
2016-10-01T15:55:19.463
16104
16104
question
grammar
どうしたの or どうしたのか？
According to the "Dictionary of Basic Japanese Grammar" page 322:  
"の is sentence-final particle used by a female speaker or a child to indicate
an explanation or emotive emphasis."

So the の used at the end of the sentence is used for emphasis.
CC BY-SA 3.0
2016-10-08T15:34:12.943
39793
2016-10-08T15:34:12.943
18157
39595
answer
The explanatory [の] particle is usually use in casual speech to make actual
question.

In casual speech, The question marker [か] is often used to consider whether
something is true or not.

By using [のか], you would be requesting a yes-no-answer along with an
explanatory answer afterward.

**[か] :**

**"Is there any problem ?**

**[の] :**

**"What is the problem ?"**

**[のか] :**

**"Is there any problem ? If yes, then what it is ?"**
CC BY-SA 3.0
2016-10-08T16:06:25.733
39795
2016-10-09T00:31:34.220
2016-10-09T00:31:34.220
18119
18119
39595
answer
どうしたの？ is often considered feminine, but many guys use it, too (though it
might depend on the region).

You don't really say どうしたのか？ to mean "What's wrong?" in conversation.*  
You'd rather say どうしたんだ？ or just どうした？ to sound masculine.

You'd use ～のか？ in yes-no questions, as in:

>   * どうしたんだ？お[腹]{なか}が[痛]{いた}い **のか** ？  
>  What's wrong? Do you have a stomachache?
>   * [何]{なに}してるんだ？[勉強]{べんきょう}してる **のか** ？  
>  What are you doing? Are you studying?
>   * どこに[行]{い}ってたんだ？[学校]{がっこう}には行った **のか** ？  
>  Where have you been? Did you go to school?
>

The examples above would sound pretty masculine. To sound feminine, you could
say like 「どうしたの？お腹が痛いの？」「何してるの？勉強してるの？」「どこに行ってたの？学校には行ったの？」

And yes, its polite/formal version is どうしたのですか？  
In speech, it's usually pronounced どうした **ん** ですか？

*You might see 「何/どう/どこ etc + のか？/のだろうか？のであろうか？etc」 in formal but not polite writing. You'd also see 「何/どう/どこ etc + か」 in subordinate clauses, eg 「何をしている **のか** 、わからない。」
CC BY-SA 3.0
2016-10-09T03:21:39.880
39820
2016-10-10T03:48:40.947
2016-10-10T03:48:40.947
9831
9831
39595
answer