Experiment slowing down towards the end


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kev_dent
kev_dent
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I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin
Dave
Dave
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kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.
kev_dent
kev_dent
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Group: Forum Members
Posts: 13, Visits: 29
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?
Dave
Dave
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Group: Administrators
Posts: 10K, Visits: 55K
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?

> Ok yes could be that is there a way to close / flush the movies from memory during the experiment?

Not really, no.

> Alternatively are there any workarounds to reduce the load on the system?

You might want to try reducing the videos size and resolution and/or try out different formats.

kev_dent
kev_dent
Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)
Group: Forum Members
Posts: 13, Visits: 29
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?

> Ok yes could be that is there a way to close / flush the movies from memory during the experiment?

Not really, no.

> Alternatively are there any workarounds to reduce the load on the system?

You might want to try reducing the videos size and resolution and/or try out different formats.

Currently the experiment is a single expt with a couple of hundred trials.
Would it be more efficient to break the experiment into multiple expts in separate scripts using batch?
Dave
Dave
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Group: Administrators
Posts: 10K, Visits: 55K
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?

> Ok yes could be that is there a way to close / flush the movies from memory during the experiment?

Not really, no.

> Alternatively are there any workarounds to reduce the load on the system?

You might want to try reducing the videos size and resolution and/or try out different formats.

Currently the experiment is a single expt with a couple of hundred trials.
Would it be more efficient to break the experiment into multiple expts in separate scripts using batch?

Yes, that might help. If you're running this offline (not on the web), then using command line syntax to run the separate scripts in sequence would be another (even better) option.
kev_dent
kev_dent
Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)
Group: Forum Members
Posts: 13, Visits: 29
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?

> Ok yes could be that is there a way to close / flush the movies from memory during the experiment?

Not really, no.

> Alternatively are there any workarounds to reduce the load on the system?

You might want to try reducing the videos size and resolution and/or try out different formats.

Currently the experiment is a single expt with a couple of hundred trials.
Would it be more efficient to break the experiment into multiple expts in separate scripts using batch?

Yes, that might help. If you're running this offline (not on the web), then using command line syntax to run the separate scripts in sequence would be another (even better) option.

I am planning to run online, not sure what you mean by command line syntax?
Dave
Dave
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Posts: 10K, Visits: 55K
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?

> Ok yes could be that is there a way to close / flush the movies from memory during the experiment?

Not really, no.

> Alternatively are there any workarounds to reduce the load on the system?

You might want to try reducing the videos size and resolution and/or try out different formats.

Currently the experiment is a single expt with a couple of hundred trials.
Would it be more efficient to break the experiment into multiple expts in separate scripts using batch?

Yes, that might help. If you're running this offline (not on the web), then using command line syntax to run the separate scripts in sequence would be another (even better) option.

I am planning to run online, not sure what you mean by command line syntax?

https://www.millisecond.com/support/docs/v5/html/howto/howtocommandline.htm

Posting this for the sake of completeness only, because it's not applicable to online settings.
kev_dent
kev_dent
Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)Associate Member (106 reputation)
Group: Forum Members
Posts: 13, Visits: 29
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?

> Ok yes could be that is there a way to close / flush the movies from memory during the experiment?

Not really, no.

> Alternatively are there any workarounds to reduce the load on the system?

You might want to try reducing the videos size and resolution and/or try out different formats.

Currently the experiment is a single expt with a couple of hundred trials.
Would it be more efficient to break the experiment into multiple expts in separate scripts using batch?

Yes, that might help. If you're running this offline (not on the web), then using command line syntax to run the separate scripts in sequence would be another (even better) option.

I am planning to run online, not sure what you mean by command line syntax?

https://www.millisecond.com/support/docs/v5/html/howto/howtocommandline.htm

Posting this for the sake of completeness only, because it's not applicable to online settings.

Ok thanks.

As an aside, is it possible to store the data within the EU, I notice this appears to be an option in the software, but I dont seem able to actually select that option when I try.
Dave
Dave
Supreme Being (804K reputation)Supreme Being (804K reputation)Supreme Being (804K reputation)Supreme Being (804K reputation)Supreme Being (804K reputation)Supreme Being (804K reputation)Supreme Being (804K reputation)Supreme Being (804K reputation)Supreme Being (804K reputation)
Group: Administrators
Posts: 10K, Visits: 55K
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
Dave - 4/21/2020
kev_dent - 4/21/2020
I am having an issue with an experiment I have created.
The experiment requires participants to remember a set of stimuli.
Then watch a short movie before having their memory tested.

I notice that the experiment seems to slow down towards the end.
The movies are presented for longer than they should be and they stutter.
The experiment then also takes several seconds maybe 10 or more to quit after the final trial.
The computer is then very slow to restore the windows and the performance is slow immediately after running the experiment.

Can somebody advise me why this is and what I can do to prevent these issues.

Best
Kevin

This very much sounds like the stimuli (here:probably primarily the videos) are simply exhausting the system's available resources.

Ok yes could be that is there a way to close / flush the movies from memory during the experiment?
Alternatively are there any workarounds to reduce the load on the system?

> Ok yes could be that is there a way to close / flush the movies from memory during the experiment?

Not really, no.

> Alternatively are there any workarounds to reduce the load on the system?

You might want to try reducing the videos size and resolution and/or try out different formats.

Currently the experiment is a single expt with a couple of hundred trials.
Would it be more efficient to break the experiment into multiple expts in separate scripts using batch?

Yes, that might help. If you're running this offline (not on the web), then using command line syntax to run the separate scripts in sequence would be another (even better) option.

I am planning to run online, not sure what you mean by command line syntax?

https://www.millisecond.com/support/docs/v5/html/howto/howtocommandline.htm

Posting this for the sake of completeness only, because it's not applicable to online settings.

Ok thanks.

As an aside, is it possible to store the data within the EU, I notice this appears to be an option in the software, but I dont seem able to actually select that option when I try.

This option is only available for Inquisit 6.
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