IPB

Welcome Guest ( Log In | Register )

Minimum number of required ABX trials, Split from from topic ID: 92851
sauvage78
post Jan 12 2012, 00:41
Post #1





Group: Members
Posts: 677
Joined: 4-May 08
Member No.: 53282



The minimal number of trials depends on how successfull you are.
How quickly you are sucessfull shows how confident in yourself you are.

The time & number of sucessfull trials are tied, you should never separate them when judging an ABX log.

With F2K ABX component, 8 sucessfull trials in a row (& if all successfull in a row, it usually means quick) trials is the minimum for me.

As soon as you begin to fail you can easyly increase to 10 or 12 to try to "erease" your failures.
In this case if you fail once or twice you can usually still get a signifiant result although it usually means the ABXing was hard, & by consequence longer as you begin to hesitate.

Usually if you begin to fail more than 3 times on 12 trials, it begins to be so hard & you have so much hesitation that it begins to take forever to ABX. At this stage I usually give up by myself & declare that I cannot ABX as in general it means I am not sure that the audio part I am focusing on actually contains any real artefact.

This post has been edited by sauvage78: Jan 12 2012, 00:42


--------------------
CDImage+CUE
Secure [Low/C2/AR(2)]
Flac -4
Go to the top of the page
+Quote Post
 
Start new topic
Replies
greynol
post Jan 12 2012, 01:10
Post #2





Group: Super Moderator
Posts: 10338
Joined: 1-April 04
From: San Francisco
Member No.: 13167



He should be conducting sets of 16 trials at first to get a feeling about how these things work, rather than being discouraged into taking shortcuts.

At this point in time it is only taking him about two minutes per test set and he's telling us the results are legitimate. He complains that doing something other than a half-baked job will take too long and you're giving the impression (intentional or not) that what he's doing is OK.

This post has been edited by greynol: Jan 12 2012, 01:32


--------------------
Your eyes cannot hear.
Go to the top of the page
+Quote Post

Posts in this topic
- sauvage78   Minimum number of required ABX trials   Jan 12 2012, 00:41
- - greynol   It is expected that you choose the number of trial...   Jan 12 2012, 00:44
- - saratoga   QUOTE (sauvage78 @ Jan 11 2012, 18:41) Th...   Jan 12 2012, 00:45
- - sauvage78   Well there is the theory & there is real life ...   Jan 12 2012, 00:56
|- - saratoga   QUOTE (sauvage78 @ Jan 11 2012, 18:56) To...   Jan 12 2012, 01:05
- - greynol   He should be conducting sets of 16 trials at first...   Jan 12 2012, 01:10
- - sauvage78   I never said I judged this test valid, I only gave...   Jan 12 2012, 01:13
|- - saratoga   QUOTE (sauvage78 @ Jan 11 2012, 19:13) I ...   Jan 12 2012, 01:17
|- - greynol   QUOTE (sauvage78 @ Jan 11 2012, 16:13) I ...   Jan 12 2012, 01:20
- - sauvage78   saratoga: Yes, I had the feeling that you were thi...   Jan 12 2012, 01:27
|- - saratoga   QUOTE (sauvage78 @ Jan 11 2012, 19:27) Ye...   Jan 12 2012, 01:32
|- - greynol   QUOTE (saratoga @ Jan 11 2012, 16:32) del...   Jan 12 2012, 01:42
- - sauvage78   Well I know this topic isn't about me but my...   Jan 12 2012, 02:31
- - greynol   The difference between you and the OP is that you ...   Jan 12 2012, 02:54
- - sauvage78   I don't even need a log anymore to trust /mnt ...   Jan 12 2012, 03:30
- - IgorC   A lot of discussion here but it won't change t...   Jan 12 2012, 03:55
|- - saratoga   QUOTE (IgorC @ Jan 11 2012, 21:55) A lot ...   Jan 12 2012, 04:06
- - sauvage78   Even if I think 5 trials is too low to convince ot...   Jan 12 2012, 04:01
|- - greynol   QUOTE (sauvage78 @ Jan 11 2012, 19:01) Ig...   Jan 12 2012, 04:13
|- - saratoga   QUOTE (sauvage78 @ Jan 11 2012, 22:01) Ev...   Jan 12 2012, 04:13
- - IgorC   I think I understand what sauvage78 wants to say. ...   Jan 12 2012, 04:46
|- - saratoga   QUOTE (IgorC @ Jan 11 2012, 22:46) It...   Jan 12 2012, 04:50
|- - IgorC   QUOTE (saratoga @ Jan 12 2012, 00:50) QUO...   Jan 12 2012, 04:57
- - sauvage78   QUOTE Are you claiming that I (or greynol) have no...   Jan 12 2012, 04:54
|- - saratoga   QUOTE (sauvage78 @ Jan 11 2012, 22:54) QU...   Jan 12 2012, 05:02
|- - IgorC   QUOTE (sauvage78 @ Jan 12 2012, 00:54) It...   Jan 12 2012, 05:03
|- - greynol   QUOTE (IgorC @ Jan 11 2012, 20:03) So it...   Jan 12 2012, 05:19
- - sauvage78   IgorC: I was more trying to say that if TOS8 is ve...   Jan 12 2012, 05:02
|- - IgorC   QUOTE (sauvage78 @ Jan 12 2012, 01:02) Ig...   Jan 12 2012, 05:06
- - nesf   From a complete newbie perspective: It could have ...   Jan 12 2012, 11:08
|- - saratoga   QUOTE (nesf @ Jan 12 2012, 05:08) From a ...   Jan 12 2012, 23:15
- - apodtele   Please read Fallacy of p-value. I just want to po...   Jan 12 2012, 17:09
|- - Porcus   QUOTE (apodtele @ Jan 12 2012, 17:09) Ple...   Jan 12 2012, 22:07
- - krabapple   It looks like we're groping towards a discussi...   Jan 12 2012, 18:00
- - nesf   A Dummies guide for doing some basic two sample an...   Jan 13 2012, 01:59


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 19th December 2014 - 05:21