The effectiveness of teaching with progressive time delay procedure on hazard warning symbols to individuals with intellectual disabilities

The purpose of this study was to investigate the effectiveness of teaching with progressive time delay procedure on hazard warning symbol to individuals with intellectual disabilities. Additionally, nontarget information presentation was conducted in this study. The nontarget informations were about the risk of all hazard warning symbol that was aimed to be taught to the individuals. Three individuals with mild intellectual disabilities ages ranging from years 11 to 13 participated in the study. One of the single subject research methodologies, multiple probe with probe trials design across participants models, was used in conducting this study. The dependent variable of this study was ability to say hazard warning symbols which are shown. The independent variable of this study was progressive time delay procedure. In the social validity at the end of study the parents opinion about utilizing progressive time delay procedure teaching on ability to say hazard warning symbols were analysed. The findings of this study demonstrated that the progressive time delay procedure is effective on teaching ability to say hazard warning symbols and all the participants maintained the hazard warning symbols 1, 3, and 4 weeks after the initial criterion was met. Additionally all participants of this study was able to generalize the hazard warning symbols on the actual products and acquired the nonetarget infortmation which were presented by researcher. The social validity of the study showed that the parents of individuals with mild intellectual disabilities have positive opinions about this study teaching with progressive time delay procedure on hazard warning symbol.