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Noldus Knowledge Base

Check out detailed explanations on how to make optimal use of your Noldus installation. You can filter on the product you’re using. Looking for quick answers to common support questions? Check out our FAQs

Knowledge Base articles - All products


UltraVox microphones are not recognized after restarting the computer

This typically occurs after the computer went to sleep. Upon restarting, UltraVox XT does not recognize the microphones.

Related to UltraVox XT

Can I get certain dependent measures (e.g., "distance moved") by zone in EthoVision XT?

It's possible to calculate any dependent variable in your Analysis Profile by zone(s). For example, you can get the “Distance Moved” within each quadrant zone in a Morris Water Maze study.

Related to EthoVision XT

Why is the sum/total of the cumulative time for all of my zones greater than the trial time?

Time in the zones may not add up to the trial duration if the subject was not tracked for the entire trial, if zones overlap or do not cover the entire arena, or if the zone exit threshold is used.

Related to EthoVision XT

What are the filter settings in Trackab?

TrackLab contains three filter settings sampling rate, smoothing window size and Minimal distance moved filter.

Related to TrackLab

Custom ErasmusLadder Experiment Protocol does not perform as programmed

Despite customizing the Experiment Protocol in the ErasmusLadder software, review of the data shows that the trials did not progress as designed. This is due do the ErasmusLadder not being able to compute and predict the trial perturbations.

Related to ErasmusLadder

How do power outages affect TrackLab operation?

TrackLab needs a stable power connection to ensure consistent operation.

Related to TrackLab

My video image is missing/black/white/grayed out in certain places in EthoVision XT (e.g., Arena Settings, Detection Settings, Acquisition, Track Editor, Manual Scoring, Integrated Visualization, etc.)

This issue involves a situation where you do not see a video image in certain places in the EthoVision XT software.

Related to EthoVision XT

Error contacting the license server in The Observer XT 16

Early versions of The Observer XT 16 may need to updated if using a software-based license, due to changes in the license server.

Related to The Observer XT

Using the MediaTypeRegistryCleaner

When video files will not play in EthoVision XT, especially MP4 videos, this tool can often resolve the issue. Media File Error (Id 8356) may be a symptom in such cases.

Related to EthoVision XT