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Visualizing Statistical Concepts

 

Ratings

Overall Rating:

4.25 stars
Content Quality: 4.25 stars
Effectiveness: 4.5 stars
Ease of Use: 3.5 stars
Reviewed: Mar 30, 2011 by Psychology
Overview: This site provides a large collection of resources for statistics instructors. The tools are designed to provide the instructor with alternative means of explaining statistical concepts. This is accomplished via a combination of interactive applets, simulations and static images. Many of the links on the page are broken and should be removed; however there is still a large quantity of valuable resources.
Learning Goals: The site is designed to facilitate student understanding and instructor presentation of statistical and research methods concepts.
Target Student Population: The target population is undergraduate and graduate students in the social sciences (and related disciplines).
Prerequisite Knowledge or Skills: Students need at least a basic understanding of statistics to be able to make full use of the resources for personal learning. In some cases a more advanced understanding of statistics or mathematics seems necessary. The materials are not consistent in their level of required knowledge.
Type of Material: This is a collection of web-based applets, simulations and images to provide supplemental educational materials.
Recommended Uses: The material would be useful for introductory and advanced statistics courses as well as beginning and advanced research methods courses. Not all students understand statistical concepts through the typical lecture-based teaching method and may require further visualizations or interactive demonstrations to better grasp the concepts. This collection of tools could prove invaluable in aiding their learning. Additionally some of the simulations presented could make very effective in-class demonstrations and would enhance lectures. Due to the knowledge required to understand some of the resources, some of the tools may be more appropriate as in-class demonstrations rather than stand-alone learning aids.
Technical Requirements: Java is required for most applets.

Evaluation and Observation

Content Quality

Rating: 4.25 stars
Strengths: The materials (that are working) are of generally high quality. Many of the links have very good supplementary materials, such as instructions on how to use the applets or how to interpret the output. All of the links in the collection have a brief description of the application. Instructors could make good use of the materials by providing assignments employing the tools and incorporating them into lectures.
Concerns: Many of the links are broken and should be removed. The site does not appear to have been maintained or at least not frequently updated. The layout is a bit haphazard with the table of contents at the top providing the only clear way of accessing a desired topic.

Potential Effectiveness as a Teaching Tool

Rating: 4.5 stars
Strengths: Instructors could integrate many of these materials into specific sections of their stats or research methods courses. Assignments could be developed based on the applets to supplement lecture or lab presentations. Online courses could also use many of the applications for primary course content. The materials are accompanied by explanations of their use and typically the concepts they demonstrate. When these explanations are combined with the demonstration or visualization they create a very potent exemplification of the concepts.
Concerns: Explanations of concepts are not always approached in the same manner and could confuse some students without instructor explanation. The site would be more effective if more learning exercises were associated with the specific applications.

Ease of Use for Both Students and Faculty

Rating: 3.5 stars
Strengths: The demonstrations are typically very easy to use and the table of contents on the main site allows easy access to concept sections and their accompanying tools.
Concerns: A large number of the links are dead. It is unclear how recently (or how often) the site has been updated. Site navigation would be easier if each page or section had a "return to top" or "return to index" button. Because the sections are not actually divided on the site itself, it may become difficult for the student or instructor to quickly locate the exact tool desired. Navigation could be improved.

Other Issues and Comments: The number and variety of links in this collection is truly impressive. However, this likely means that links frequently go dead. So, for the site to be maximally effective, more frequent updating and monitoring is necessary. Instructors and students will need to have Java installed on their computers to utilize all of the tools. Additionally usability in older web-browsers could not be confirmed.
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