APRIL 2009
4a) Explain the concept of threats to validity in the training evaluation. (8 marks)
Threats to validity refer to factors that will lead an evaluator to question either the believability of the study results or the extent to which the evaluation results are generalizable to other group of trainees and situations.
The believability of study refers to internal validity. The internal threats to validity relate to characteristics of the company (history), the outcome measures (instrumentation, testing), and the person in the evaluation study (maturation, regression toward the mean, mortality and initial group differences).
Threats to external validity relate to how study participants react to being included in the study and the effects of multiple types of training such as reaction to pretest, reaction to evaluation, interaction of selection and training and interaction of methods.
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