South African hacker history South African hacker history A brief history of computer hacking in South Africa. Note: A distinction needs to be made between a "white hat" hacker who hacks out of intellectual curiosity, and a "black hat" hacker who has ulterior motives. In recent times there has been an attempt to restore the meaning of the term hacker, which is still associated with creating code, and its secondary meaning, which has become the stuff of Hollywood legend. The term "cracker" is a better description for those who break into secured system by exploiting computer vulnerabilities. Activists are trapped by BOSS agents who
Item analysis Item analysis Within psychometrics, Item analysis refers to statistical methods used for selecting items for inclusion in a psychological test. The concept goes back at least to Guildford (1936). The process of item analysis varies depending on the psychometric model. For example classical test theory or the Rasch model call for different procedures. In all cases, however, the purpose of item analysis is to produce a relatively short list of items (that is, questions to be included in an interview or questionnaire) that constitute a pure but comprehensive test of one or a few psychological constructs. To carry out the