Millisecond Forums

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peter - 8/21/2020

Hi, I am using an online task where timings are very sensitive. The inevitable timing variations that kick in thanks to differences in PC processing speeds and refresh rates means that i may have a problem. It occurred to me though that Inquisit audit data may allow for trial by trial and PC by PC timing differences to be modelled and controlled for.

I therefore have a couple of questions.

1) Am I mad to think this will work.
2) Is it possible to get identifying information like a participant number or prolific academic id code into the audit data itself or its filename.

Many thanks for any help
Peter

> 1) Am I mad to think this will work.

I don't know! What I'd do alternatively or in addition is just log the various device-speciffic properties to the raw and/or summary data file.

https://www.millisecond.com/support/docs/v5/html/language/elements/computer.htm
https://www.millisecond.com/support/docs/v5/html/language/elements/display.htm
https://www.millisecond.com/support/docs/v5/html/language/properties/refreshrate.htm
https://www.millisecond.com/support/docs/v5/html/language/properties/refreshinterval.htm

Timing information for stimuli you should already have in the data (stimulusonset columns), if you're not logging those, I'd recommend you do so. In addition, you can log a whole bunch of timestamp information which may be useful for modelling differences.

https://www.millisecond.com/support/docs/v5/html/language/properties/timestamp.htm

> 2) Is it possible to get identifying information like a participant number or prolific academic id code into the audit data itself or its filename.

Not in the data itself, but you'll have the subject ID in the file name:

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Dave - 8/21/2020

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peter - 8/21/2020

Hi, I am using an online task where timings are very sensitive. The inevitable timing variations that kick in thanks to differences in PC processing speeds and refresh rates means that i may have a problem. It occurred to me though that Inquisit audit data may allow for trial by trial and PC by PC timing differences to be modelled and controlled for.

I therefore have a couple of questions.

1) Am I mad to think this will work.
2) Is it possible to get identifying information like a participant number or prolific academic id code into the audit data itself or its filename.

Many thanks for any help
Peter

> 1) Am I mad to think this will work.

I don't know! What I'd do alternatively or in addition is just log the various device-speciffic properties to the raw and/or summary data file.

https://www.millisecond.com/support/docs/v5/html/language/elements/computer.htm
https://www.millisecond.com/support/docs/v5/html/language/elements/display.htm
https://www.millisecond.com/support/docs/v5/html/language/properties/refreshrate.htm
https://www.millisecond.com/support/docs/v5/html/language/properties/refreshinterval.htm

Timing information for stimuli you should already have in the data (stimulusonset columns), if you're not logging those, I'd recommend you do so. In addition, you can log a whole bunch of timestamp information which may be useful for modelling differences.

https://www.millisecond.com/support/docs/v5/html/language/properties/timestamp.htm

> 2) Is it possible to get identifying information like a participant number or prolific academic id code into the audit data itself or its filename.

Not in the data itself, but you'll have the subject ID in the file name:

Many thanks i will have a look at those options
Peter