Hi,
you wanted to have a random selection

can there randomly be only 1 question out of those max. 4 questions?

and you got one.
And as the selection is randomly each time there is always the chance that something is never selected.
Calculate the probability. It's about 18%

Now you say

The ideal situation is, 2 questions randomly show for each WGNT. Wondering is it possible?

Two questions randomly?
You know how it works.
At the moment you sum up the relevanceStatus and show questions as long as it is less than 1.
Meaning: At the start the sum is equal 0, after the first question it is equal 1
Now it is really obvious what you have to do to get 2 random questions.

But, do you really avoid that one of the four is never displayed. Remember, it is still a random selection. But this probability is only about 1.5%

In my opinion you should revise this part of the survey.
A rough idea:
There is the string "eqGroupsFinal" like "WGNT".
By the way:
As the order of the characters is not important for the first part of your survey (there is only asked "does the strinfg contain the character?) you may randomize the order.

Now ask the
1st switch about the first character
2nd switch about the second character
3rd switch about the third character
​​​​​​​4th switch about the fourth character
​​5th switch about the fifth character
...
This way there is only one question "Switch" and you taylor the display.
1. Join the string with itself to have a string at least 6 characters long
2. Get the character by the function "substr"
3.a. Display the question text of switch 1 using a nested IF, like
"Would you switch your current mode {if(substr(string,0,1)=="A","W",if(substr(string,0,1)=="B","G",if(substr(string,0,1)=="C","N",if(substr(string,0,1)=="D","L",if(substr(string,0,1)=="E","S","T")))))} to other modes?"
3.b. Display the question text of switch 2 using a nested IF, like
"Would you switch your current mode {if(substr(string,1,1)=="A","W",if(substr(string,1,1)=="B","G",if(substr(string,1,1)=="C","N",if(substr(string,1,1)=="D","L",if(substr(string,1,1)=="E","S","T")))))} to other modes?"
...

This might be another option.

Joffm




 

Thank you Joffm very much for your time and effort!

It seems your understanding was every time 2 questions randomly show. But sorry that I didn't make it clear by saying "The ideal situation is, 2 questions randomly show for each WGNT". 

The ideal situation is still everytime only 1 question randomly show but at the same time to ensure that finally every trip purpose would appear 2 times, or at least avoid that any of the four is never displayed.

For instance, if WGNT trips were reported.
Then there would be in total 8 switch questions, and ideally 2 questions go for W, 2 for G, 2 for N, 2 for T, in stead of the former situation: 2 for W, 0 for G, 3 for N and 3 for T. Wondering is it possible？

Also thanks for your idea about using nested IF, the thing is in those switch questions there are not only the question texts itself "would you switch your...?", but also texts of information about details of reported trips using Expression Manager like {tripdistanceW.shown} (this part was omitted in the lss. file). So seems this method would not work in this situation where texts related to previous questions.

Many thanks,
Xueting

 

I showed you how you can achieve that.

One typo:
I wrote

1. Join the string with itself to have a string at least 6 characters long

Should be 8 characters.
So either you had four trips -> the string is "WGNTWGNT"; each is asked twice
Or only three trips: "WGTWGTWGT"; W and G are asked three times T two times
And so on.
Create a small sample survey and try.

Also thanks for your idea about using nested IF, the thing is in those switch questions there are not only the question texts itself "would you switch your...?", but also texts of information about details of reported trips using Expression Manager like {tripdistanceW.shown} (this part was omitted in the lss. file). So seems this method would not work in this situation where texts related to previous questions.

Of course it does.
If you have to insert an ExpressionScript value into the TRUE-part of an IF-statement, it is like this
{if(condition,"Some text "+eqCalculatedValue+" and some more text",if(...))}

Joffm

 

Hi Joffm,
Thanks a lot!
I tried but I'm not sure that I fully understand.
What I've done is
1) using lencha to make string have 8 characters.
 

2) Display the question text of switchs using a nested IF, like
"Would you switch your current mode {if(substr(string,0,1)=="A","W",if(substr(string,0,1)=="B","G",if(substr(string,0,1)=="C","N",if(substr(string,0,1)=="D","L",if(substr(string,0,1)=="E","S","T")))))} to other modes?"

3) Set the 8 switch questions in the same randomization group.

Result of one example:
4 trips WGNT, and in the end I got switch questions of NGTNTWGW, 2 for each one, which is good.

The thing is the chosen options in s1-s8 no longer show as options in the switch questions. For instance
in the following situation option 6 and 7 should show in the options of switch1.
 


Then I realized that maybe I should've let the switch question random, but let the string characters random, wondering is there any method?

The lss. file is attached, thanks again for your attention!
 

Regards,
Xueting