It is possible that one treatment intervention can be more effective in young people than in adults or the elderly (Alashram, Annino, Raju, & Padua, 2020). More research is also needed to determine the best duration that the patients should undertake the intervention and in what frequency and quantity. Availability of adequate resources is one of the factors that may have contributed to these achievement shortfalls. The researchers may have fallen short of their available resources to conduct further research on some or all of these areas of concern. Secondly, environmental factors can also lead to these achievement shortfalls where the researchers could not be in an environment with people of different ages with traumatic brain
