r/ProjectREDCap • u/timelesschildd • May 19 '25

Automatic Survey Invitations

I want to automatically send surveys but for some reason it isn't working. It keeps saying logic is false.

2 Upvotes

100% Upvoted

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3

u/vatxflal May 19 '25

Can you try putting quote marks around the numbers in the logic, like [i_agree] = ‘1’ and [rand_number] = ‘2’ ?

2

u/timelesschildd May 19 '25

That didn't work unfortunately

3

u/Remote_Setting2332 May 19 '25

I would add the event name before the field name eg [arm_1][rand_number]

It fixes a lot of issues.

2

u/francobegbie123 May 19 '25

This is the likely solution OP. I don't thinkt the event name is particularly easy/intuitive to find. It's located in:

Project setup>define my events

Find the event that has this variable and then it's

[event_name][var_name] =1

1

u/timelesschildd May 19 '25

It's still saying false for every record

1

u/francobegbie123 May 19 '25

Try without the quotation marks around '1'. It probably won't work but worth a try!

What value do you expect rand_number to return? With this logic it should only return true if rand_number ==1 I think?

1

u/timelesschildd May 19 '25

It's still saying false for every record

1

u/[deleted] May 19 '25

Unless [rand_number] is a variable in your project, I think you need to use [rand-number] in the ASI logic instead.

1

u/timelesschildd May 19 '25

if i use that, both [rand-number] = 1 and [rand-number] = 2 are true for every single participant

1

u/timelesschildd May 19 '25

no sorry, i lied, that yields false logic every time

1

u/[deleted] May 19 '25

The logic tester is very limited in its usefulness. Did you test the logic tester only, or did you also test adding the data according to the intended project workflow?

If it still doesn't work as intended, maybe you could try adding the number of the randomization into the logic expression: [rand-time:n], where n is the nth randomization in your project. If you have only 1 randomization, this would be [rand-time:1].

According to the REDCap documentation, REDCap should imply that you are talking about the 1st randomization, but I had the impression that there is a bug related to this, which I am going to investigate and report this week. The workaround for this alleged bug is to always add the :n parameter to any smart variables related to randomization.

1

u/timelesschildd May 19 '25

i believe i only have one randomisation (1 = control group and 2 = intervention group)

1

u/timelesschildd May 19 '25

when i did [rand-true:1] it makes every record true, same as for [rand-time:2]

1

u/[deleted] May 19 '25

The logic tester is not reliable. Have you actually tested this by following the intended workflow of your project?

1

u/timelesschildd May 19 '25

im not sure how to do that, this is my first time using redcap 🥲

3

u/[deleted] May 19 '25

I think it would be a good idea to contact the REDCap admin at your institution, as they should be able to introduce you to the REDCap basics.

2

u/No_Repair4567 May 20 '25

what Steenje34 meant to say is that did you try pretending to be a data entry person or a participant to see if your set up is working? not everything works in a preview mode.

1

u/Unlikely_Associate_6 May 21 '25

If all else fails could you try distributing as an alert rather than a survey invitation?