All, Having just decried the lack of interesting cognitive psychology insights available on the programming task. This weeks New Scientist contains a very interesting article that looks relevant: http://www.newscientist.co.uk/features/features_226844.html I have to admit to making some of the mistakes predicted by the examples. Johnson-Laird is not a name known to me. But I shall certainly be reading his papers. derek -- Derek M Jones tel: +44 (0) 1252 520 667 Knowledge Software Ltd mailto:[EMAIL PROTECTED] Applications Standards Conformance Testing http://www.knosof.co.uk
