Strategic preparation for achievement testing

Applets

Ben Wilbrink

For the text on the SPA model see the project.


Applets 1 belong to module 1 the Generator.





applets     advanced applets         other applets


    1         1a    Generator        — 1m. 3-valued — 1o. 1oa advanced
    2         2a    Mastery Envelope
    3         3a    Predictor
    4         4a    Ruling
    5         5a    Learning
    6         6a    Expectation     6b. special 6.1a.  advanced
    7         7a    Last Test
    8         8a    Strategy
    9         9a True Utility


applet 1


Module 1 The Generator: Insecurity quantified


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the generator


menu items






Generator applet 1m: three-valued


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The three-valued generator implements a model allowing the specification of the parameter ‘misunderstanding’ and the parameter ‘bonus’,

October 10 2009. The applet does not function appropriately. I will correct this problem in a few days time. Do not put ‘wrong’ = 0 or 1 - ‘wrong’ = ‘mastery.’
The model is not binomial. Of course, it is possible to approximate this model’ theoretical and simulated distribution using a binomial on the parameter p = mastery + bonus * ( 1 - mastery - wrong ). Comparing the 3-valued model results to those of the approximation, shwos the results of the 3-valued model to be a fraction too low. This is the other problem that I will have to solve.
The explanation of the approximation formula is rather simple. The expectation of the score to be earned on the very first item is E( score ) = mastery + bonus * ( 1 - mastery - wrong ). Translate this expectation into a probability to get a score of 1 point. Voila.

new menu items in this three-valued generator






Generator applet 1msc: free scaling of the plot


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In order to manipulate the plot, one should be free to choose the horizontal and vertical scaling.

new menu items: scaling






Advanced applet 1


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new menu items


 





applet 1 (older version)

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Here you will find another, older, version of the module 1 applet (also its advanced version here below), based on the class DoBinomial dedicated to the binomial / the generator only. DoBinomial is the class that takes care of (most) everything that is input or output, including plotting of distributions. DoBinomial uses the class Basics: the methods Basics.getSimulatedBinomial and Basics.Binomial. The class Basics always is the most recent version, the class is used by most or all other applets of the SPA model. The methods mentioned come in two flavors: a five resp. three parameter method is the standard, a nine (Basics.Simulate) resp. eight parameter method to take care of two tests cases and/or subdomain divisions.


menu items


gif/generator1.1.gif




   


Advanced applet 1 (older version)

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Here you will find another, older, version of the module 1 applet’ advanced version, based on the class SPA_DoBinomial dedicated to the binomial / the generator only. SPA_DoBinomial is the class that takes care of (most) everything that is input or output, including plotting of distributions. SPA_DoBinomial uses the class SPA_Basics



If you come across an applet that is not functioning properly, please mail me. It is not possible always to check all applets for unintended consequences of changes in classes. As this is a project in progress, such changes are made on a routine basis.

Applets are known to work correctly under:
Internet Explorer under Windows XP
Firefox 1.0.7 under Windows XP
Safari 1.2 under MacOSX 10.3.9
FireFox 1.5.0.4 under MacOSX 10.3.9

It might be the case that the applets do not open properly in browsers under Windows, or in browsers other than Safari under MacOS X: the applet field remains gray or blank.
In module chapters original applets have been replaced with screenshots; therefore applet problems should not hinder readers of the SPA project. Readers not able to use the applets in their browser, and yet willing to do so, may contact me, if preferences of the browser pertaining to Java do not seem to be the problem.

Information about Java, and applets in particular:
http://java.sun.com
http://java.sun.com/applets/

MacOS X: There is a problem with Java versions 1.4 for browsers other than Safari. See http://javaplugin.sourceforge.net/Readme.html; http://developer.apple.com/documentation/Java/Conceptual/Java131Development/deploying/chapter_3_section_5.html; simile.mit.edu/repository/ misc/java_embedding_plugin/readme.rtf
MacOS X: Opera, version 8.5, produces 'java.lang.UnsupportedClassVersionError: Spa_BinomialApplet (Unsupported major.minor version 48.0)
MacOS X: Internet Explorer 5.2 for Mac, [preferences: enable Java on; cookies: never ask; web content: enable plug-ins on] produces 'java.lang.UnsupportedClassVersionError: Spa_BinomialApplet (Unsupported major.minor version 48.0)

Windows: Java Applet plug-in makes it possible for your computer (including Windows¨ XP, Me, NT, 2000, 98, or 95) to run applets in your browser. http://www.mcdonalds.com/search/help/plug_play/sunmicro.html




Mail your opinion, suggestions, critique, experience on/with the SPA


October 10, 2009 \ ben at at at benwilbrink.nl


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