PSLC DataShop provides two main services to the learning science community:
- a central repository to secure and store research data
- a set of analysis and reporting tools
Researchers can rapidly access standard reports such as learning curves, as well as browse data using the interactive web application. To support other analyses, DataShop can export data to a tab-delimited format compatible with statistical software and other analysis packages.
Thursday, 16 February 2017
DataShop 9.3 released - Beta version of Tigris
The latest release of DataShop includes a Beta version of the workflow tool, now referred to as Tigris.
In order to facilitate the sharing of analyses, Tigris users can view global workflows created by other users. If the data included in a workflow is public or is attached to a dataset that the user has access to, then the workflow imports, component options and results are all accessible. If the user does not have access to the dataset they can view the workflow as a template. In both cases, users can create a copy of the workflow for use with their own data.
As part of the LearnSphere project, contributors from CMU, the University of Memphis, MIT and Stanford have been building workflow components, many of which are already available in Tigris. The latest code, with descriptions of each component, can be found in GitHub. If you would like to add your analysis, import, or visualization component to Tigris, please contact us for information on how to get started.
In addition to Tigris improvements, we have added a few enhancements and fixed several bugs:
- Users can now make a web service call to retrieve the list of data points that make up any given Learning Curve graph. The list of points can be generated for a particular skill in a specific skill model (KC Model). More about this feature can be found in the updated DataShop Public API doc.
- For OLI datasets, the Learning Curve graphs were extended to include a "high stakes error rate" data point. If you have an OLI dataset for which you'd like to see this analysis, please contact us as we will need to reaggregate your dataset to generate the necessary information.
- Long Input values were being truncated in the Error Report. This issue has been addressed.
- The Problem List page was failing to load for datasets with a very large number of problems per hierarchy, or dataset level. This has been fixed.
Friday, 10 February 2017
Attention! DataShop downtime for release of v9.3
DataShop is going to be down for 2-4 hours beginning at 8:00am EST on Thursday, February 16, 2017 while our server\ s are being updated with the new release.
Friday, 14 October 2016
DataShop 9.2 released - Alpha version of Workflow tool
The latest release of DataShop introduces an analytic workflow authoring tool. The alpha version of this tool allows users to build and run component-based process models to analyze, manipulate and visualize data.
The workflow authoring tool is part of the community software infrastructure being built under the umbrella of the LearnSphere project, with partners at Stanford, MIT and the University of Memphis. The primary data flow in a workflow is a table so users are not restricted to DataShop data. The platform will provide a way to create custom analyses and interact with proprietary data formats and repositories, such as MOOCdb, DiscourseDB and DataStage.
Users can request early access to the Workflow tool using the "Workflows" link in the left-hand navigation. Once granted access, this becomes a link to the "Manage Workflows" page, which is also available as a main tab on each dataset page.
Workflows are created by dragging and dropping components into the tool and making connections between components. Options can be configured for each component by clicking on the gear icon . For example, in the import component, users can upload a file or choose from a list of dataset files for which they have access.
Once a workflow has been run, clicking on any component's magnifying glass icon or the primary "Results" button will display the output of each component. A preview of the results is also available as a mouse-over on the component output nodes.
In the near future, we will invite users to contribute their own components to the Workflow tool. This feature will allow researchers to share analysis tools, for application to other datasets.
In addition to the Workflow tool, we have added a few enhancements and fixed several bugs:
- The Metrics Report now includes an "Unspecified" category for datasets without a Domain or LearnLab configured. In previous releases these datasets were not reflected in the report, causing the amount of data shown to be less than the actual data.
- KC Model exports are now being cached, allowing for faster exports of models in the same dataset.
- Users running their own DataShop instances will find that Research Goals now include links to recommended datasets and papers on the master server, DataShop@CMU.
- For Dataset Uploads, two restrictions on the upload format have been relaxed. See the Tab-delimited Format Help for details.
- If a Step Name is specified, the Selection-Action-Input is no longer required.
- Previously, if both the Problem View (PV) and Problem Start Time (PST) were specified, then the PV was recomputed based on the PST. With this release, if the two values do not agree, the PV in the upload is used.
- Users are now required to select a Domain/LearnLab designation during dataset upload.
Monday, 10 October 2016
Attention! DataShop downtime for release of v9.2
DataShop is going to be down for 3-4 hours beginning at 7:00am EST on Friday, October 14, 2016 while our servers are being updated for the new release.
Tuesday, 26 April 2016
DataShop 9.1 released
In the spirit of collaboration, this release focuses on integration with our LearnSphere partners, with the long-term goal of creating a community software infrastructure that supports sharing, analysis and collaboration across a wide variety of educational data. Building on DataShop and efforts by partners Stanford, MIT and the University of Memphis, LearnSphere will not only maintain a central store of metadata about what datasets exist, but also have distributed features allowing contributors to control access to their own data. The primary features in support of this collaboration are:
- DataShop now supports both Google and InCommon Federation single sign-on (SSO) options. SSO allows users to access DataShop with the same account they're already using elsewhere, e.g., your university or institution in the case of the InCommon login.
If you currently use the local login option, please contact us about migrating your account to one of the SSO options.
- Users can now upload a DiscourseDB discourse to DataShop. With support for DiscourseDB, users can view meta-data for discourses and, with appropriate access, download the database import file (MySQL dump).
- We have developed a DataShop virtual machine instance (VMI) which allows users to configure their own slave DataShop instance. The remote (slave) instance is a fully-functioning DataShop instance that runs on your server, allowing you to maintain full control over your data, while having your dataset meta-data synced with the production, or master, DataShop instance. If you are interested in having your site host a remote DataShop instance, please contact us.
In addition to the headlining features, this release also adds the following support:
- Users can now create a sample of their dataset by filtering on Custom Fields. Sampling by the name and/or the value of the custom field is supported. This allows users to create subsets of datasets based on particular values assigned to each transaction by the tutor. For example, a step can be categorized as being high- or low-stakes for the student and the tutor can mark the relevant transactions with this information allowing those analyzing the data to filter on this information.
- The Additive Factors Model (AFM) is no longer limited explicitly by the number of skills in a skill model. Previously, AFM would not be run if there more than 300 skills in a model. Now, the number of students and the size of the step roll-up, as well as the number of skills, factor into the decision.
- The file size limit for dataset and file uploads was increased from 200MB to 400MB.
- The number of KC Models in a dataset is now part of the dataset summary on the project page.
- Alignment errors were fixed in the KC Model Export for the case of multiple models with multiple skills.
- Clearing the Project on the Dataset Info page no longer results in a error.
- The Error Report now correctly displays HTML/XML inputs in the Answer and Feedback/Classification columns. Similarly, display errors resulting from inputs that contain mark-up, were fixed in the Exports.
Monday, 25 April 2016
Attention! DataShop downtime for release of v9.1
DataShop is going to be down for 7 hours beginning at 6:00am EST on Tuesday, April 26, 2016 while our servers are being updated for the new release.