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 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:

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

Strategic preparation for achievement testing

Applets 3 and 3a advanced

Ben Wilbrink

For the text on the SPA model see the project.
Applets 3 belong to module 3 the Predictor.

applets     advanced applets         other applets

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

applet 3

Module 3 The Predictor: Place your bets

The applet here is SPA_BeBiApplet.class, a class dedicated to the predictive score distribution only, in its basic form. This applet was finished April 2005. However, the fundamental classes that it makes use of—such as to evaluate the binomial distribution or the likelihood function of mastery—will be more recent or the most recent versions, as described in the text on the particular modules.

Remember that the predictive score distribution is conditional on the likelihood function of mastery, so at least in the simulation the likelihood function will be simulated first, using the givens on number correct on a preliminary test of a certain length —or information value. Nothing in the report on the simulated predictive function and its statistics directly refers to that likelihood, yet it is there, it might have been plotted or printed also but to avoid clutter this kind of information on in-between results of the analysis or simulation will be withheld. In the case of analysis only, it is known that the predictive score distribution is a beta binomial distribution, obviating the need to evaluate the likelihood function of mastery—a beta function—first.

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new menu items

fundamental classes used

Advanced applet 3

The applet here is SPA_a_ProjPredApplet.class, a class dedicated to the predictive score distribution only, in its advanced form. The applet uses the same fundamental classes as other applets do, only the household chores and the menu differ from other applets that might be used to eveluate predictive score distributions. I will make those alternative applets available also, if only to have available some alternative just in case this particular applet might not function properly.

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October 2008. Something tricky here. The applet does not seem to agree in its results with the straight 3 applet above. How come? It might have something to do with the learning function/learning episodes.

new menu items

In fact, this is the advanced applet belonging to the Expectations module 6. It contains utility and learning parameters. To use it as the advanced applet for immediate predictions, put the value(s) for the number of episodes at one.

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

March 5, 2008 \ contact ben at at at benwilbrink.nl

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