SINGLE – SUBJECT EXPERIMENTAL RESEARCH DESIGNS: IMPLICATIONS FOR BEST PRACTICE IN AUTISM SPECTRUM RESEARCH AND INTERVENTION

Rufus Olanrewaju ADEBISI, & Ugochi Nnenna NDOH

 ABSTRACT

This paper looked at the constitution of ASD as umbrella term that means a developmental disability significantly affecting verbal and nonverbal communication and social interaction, manifesting before age three and can negatively affect a student’s educational performance. It can also engage in repetitive activities and stereotyped movements, resistance to environmental change or change in daily routines, and unusual responses to sensory experiences. The paper discussed the various components of single subject design, which include the repeated measurement of a dependent variable or the target problem, the baseline phase (abbreviated by the letter A) that represents the time in which the intervention to be evaluated is not offered to the participant, the treatment phase (abbreviated by the letter B) represents the time period during which the intervention is implemented and the graphing the data makes easy the monitoring and evaluating the impact of the intervention. The types of single subject research design that included AB design, reversal design, changing criterion design, multiple baseline design and the withdrawal designs were cleared highlighted. Various implications of single subject design for evidence based practice and ethical issues in the design and recommendations were clearly stated.

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