Sample Selector

Sample Selector is a tool for creating and editing samples, or groups of data you compare across—they're not "samples" in the statistical sense, but more like filters.

By default, a single sample exists: "All Data". With the Sample Selector, you can create new samples to organize your data.

You can use samples to:

A sample is composed of one or more filters, specific conditions that narrow down your sample.

Creating a sample

The general process for creating a sample is to:

The effect of multiple filters

DataShop interprets each filter after the first as an additional restriction on the data that is included in the sample. This is also known as a logical "AND". You can see the results of multiple filters in the sample preview as soon as all filters are "saved".

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Export Format History

The following is a list of changes to the various export formats, arranged by time of the change.

Transaction format

August 2009

  • Added Duration (sec) column.

Student-step format

August 2009

  • Renamed Assistance Time (sec) to Step Duration (sec).
  • Renamed Correct Step Time (sec) to Correct Step Duration (sec).
  • Added Error Step Duration (sec) column.
  • Removed Step Time, which was the time of the first correction attempt or, in the absence of a correct attempt, the final transaction on that step.
  • Added Correct Transaction Time.

Student-problem format

KC Model export

August 2009

  • Renamed Avg Assistance Time to Avg Step Duration.
  • Renamed Avg Correct Step Time to Avg Correct Step Duration.
  • Added Avg Error Step Duration.
Version 3.6.9 October 28, 2009 LearnLab logo