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How to prevent participants from running an Inquisit experiment on mobile devices?

Tahwan — Tue, 18 Feb 2025 15:11:49 GMT

Hi everyone,

I am trying to prevent participants from running my Inquisit experiment on mobile devices (e.g., smartphones running Android or iOS). I initially tried the following code:

[code]<expt>
/onexptbegin = [
if (computer.os = "ios") script.abort(true);]
</expt>[/code]

However, I get the error message: 'computer.os' The expression attempts to set the value of a read-only property.

What would be the correct way to check the operating system or device type and terminate the experiment if it's running on a mobile device? I only want participants to do the script on a regular computer.

Thanks in advance for your help!

RE: How to prevent participants from running an Inquisit experiment on mobile devices?

Tahwan — Tue, 18 Feb 2025 15:11:49 GMT

Thanks. That is an easy fix!

RE: How to prevent participants from running an Inquisit experiment on mobile devices?

Dave — Tue, 18 Feb 2025 12:18:49 GMT

+x[quote]

[b]Jakob - 2/18/2025[/b]
Hi everyone,

I am trying to prevent participants from running my Inquisit experiment on mobile devices (e.g., smartphones running Android or iOS). I initially tried the following code:

[code]<expt>
/onexptbegin = [
if (computer.os = "ios") script.abort(true);]
</expt>[/code]

However, I get the error message: 'computer.os' The expression attempts to set the value of a read-only property.

What would be the correct way to check the operating system or device type and terminate the experiment if it's running on a mobile device? I only want participants to do the script on a regular computer.

Thanks in advance for your help!
[/quote]

You are using the wrong operator. You are trying to set the computer.os property to the value "ios". That cannot work, it's read-only. "=" is the assignment operator. What you need is "==", the logical comparison operator.

https://www.millisecond.com/support/docs/v6/html/language/expressions/operators.htm