The Observer 5.0

The Observer freezes when I play back a video file at play speeds 1/2 or 1/5

Problem 

The problem occurs when you have installed both The Observer 5 and The Observer XT on your computer and you score from a video file in MPEG-1 format in The Observer 5. The problem is caused by The Observer XT Decoder Package. 

Solution 

To play back MPEG-1 files in The Observer 5, The Observer XT Decoder Package is not needed. You can disable it (and enable it again when you want to score from MPEG-2 files). Please contact Noldus Technical Support, they can provide you with the files to disable/enable the Decoder Package.

Knowledge base: 
product: 
The Observer

Time during which the observation was suspended included in the analysis

Problem 

This occurs when you suspend an observation and create a time-based interval in the Data Profile. In The Observer, all time-event based intervals are defined by the elapsed time, not the observed time. Suppose you suspend an observation from 30 to 60 seconds, and then you want to analyze the first 60 seconds of the actual observation (therefore, you want to analyze from 0 to 30 and from 60 to 90, because the time between 30 and 60 does not contain data). In the Data Profile, you create an interval from 0.00 s to 60.00 s assuming that The Observer will skip the 30 s of suspended observation. However, the actual interval will go from 0.00 to 60 s of elapsed time, which will include the 30 seconds of suspended observation.

Solution

To solve the problem, re-define the intervals in the Data Profile so that they exclude the suspended part of the observation.

Knowledge base: 
product: 
The Observer 5

The Observer crashes when I run Reliability Analysis

Problem 

The problem occurs in The Observer 5.0.20 when you have selected in the Reliability Analysis Settings window:

  • on the Method tab, Duration/Sequence as comparison method,
  • on the Input tab, an observation in the First Observation Group field that does not contain initialized channels. This means that in this observation there is no valid state behavior at time= 0.00 for at least one channel. One possible cause is that you have selected 'Score behaviors outside channels' (from the Customize menu, select Data Entry) before starting that observation.

 

Possible solutions 

Knowledge base: 
product: 
The Observer

The Observer does not record the behaviors after I resume the observation

Problem

This error occurs when you score an event behavior (with no duration), then you suspend the observation, and you do not change the state behavior before resuming (click a code for a state behavior and then click Resume). In this case, The Observer resumes the observation as if the channel was not initialized. The first behavior recorded is the behavior you score after you have resumed the observation (see below).

Knowledge base: 
product: 
The Observer

The values of Rate or Duration percentages are not as I expect

Problem 

The problem occurs when you suspended the observation at least once. When you suspend an observation, the Elapsed time continues to run, while the Observed time stops until you resume the observation. The Observer calculates Rate and Duration % according to the elapsed (thus, the total time from start to end), not the actual observed time (total minus the suspended time). Therefore, these values generally underestimate the 'real' Rate and Duration % values.  


Solution 

There are two ways to obtain the statistics of rate and duration of behaviors independent of the time that the observation was suspended:

Knowledge base: 
product: 
The Observer

The Elementary Statistics or Lag Sequential Analysis result shows rows or columns that seem unrelated to any modifier

Problem 

(see the red arrows in the figure below: in this case, Modifier 2 is not shown)

A Lag Sequential Analysis result with rows and columns showing an 'empty' Modifier 2.

The error occurs when your data record includes two modifiers, and during analysis you select both Modifier 1 and Modifier 2 in the Layout tab of the Elementary Statistics or Lag Sequential Analysis Settings window.

Knowledge base: 
product: 
The Observer

The analysis shows no results at all, but I am quite sure the behaviors were in the Data Profile

Problem 

This happens when you have deleted all modifiers from the data profile (for example, because you wanted to perform a simple analysis on behaviors only). However, if modifiers are deleted, then all the behaviors that are attached to those modifiers are removed as well.  


Solution 

Instead of removing modifiers from the data profile, you can do one of the following:

product: 
The Observer

I get the message, 3.1.10 Database Access Error, 4.0.2 Unhandled error with Observer

We are trying to run an analysis with 1 or 3 ODF files. It does not matter which one analysis, but we come across the following errors and the Observer program shuts down without saving the analysis. The errors are 3.1.10 Database Access Error, 4.0.2 Unhandled error with Observer, observer is shutting down. Got any suggestions?

  1. Check all data file names for odd characters like apostophe's or non-latin letters.
  2. If present, remove the data file (ODF) from project
  3. Edit data file name on hard drive and then add data file back to project and proceed with analysis.
product: 
The Observer 3, The Observer 5

What is the exact pathway on the workabouts where the configuration should be loaded?

By default, the configuration files go to M:/OPL/XXX.CNF

This is fine as configuration files are small and you usually only load a couple of them, taking into consideration the M drive doesn't have much available space on them. Also, should the WorkAbout crash and need to be reset, you will lose everything on the M drive.

Being that you have a copy of the CNF on the PC, this is not detrimental. It is however if you save all your data files (ODH) on the M drive and something happens to the workabout before you have a chance to upload those files to the PC.

So, if anything, make sure the ODH files are stored on the A drive. A:/OPL/XXX.ODH. The A drive also stores the Observer software on it. So the A drive also has limited available space but sufficient if you monitor your space and upload to the PC often enough and delete files afterwards. Most people have plenty of room when they do it this way.

product: 
PocketObserver, The Observer 3, The Observer 5

How can I speed up the Analysis in The Observer? It currently seems to take a very long time to analyse all my data. [Keywords: slow, analysing, data files, Time-Event View, Reliability, Elementary Statistics, Lag Sequential, faster]

Regarding the analysis speed of The Observer: we are aware that the analysis can take quite some time especially when lots of data have to be calculated. On the other hand one has to realize that the amount of calculations that sometimes has to be executed can be enormous (think of all the possible combinations of different observations, independent variables, time intervals, nesting levels, subjects, modifiers, etc.). Although there is no maximum data limit in The Observer, the analysis may require some patience in those cases. Nevertheless, analysis speed has increased with every update/upgrade of The Observer since the release of version 4.0 (2001), and this remains an issue that certainly has our attention. For future upgrades we are seriously trying to further improve the performance of the software as far as analysis speed is concerned.

Knowing this may not help you very much at this moment, here are a few tips that may help, additional to the ones already given by other Forum members:

  • Make sure you use version 5.0.25, which is significantly faster than previous releases. Registered users of 5.0 can download it from our website.

     

  • Knowledge base: 
    product: 
    The Observer 5