This is because when our attention is diverted, we use up valuable cognitiveresources reorienting ourselves, leaving less mental energy for completing our work.
It is recognised that the ability to decode individual words is not sufficient, hence the materials simultaneously attend to fluency which promotes comprehension by freeing cognitiveresources for interpretation.
It became clear that there was often a threshold moment during which some kind of a challenge or trigger prevented the recovering person from accessing his or her cognitiveresources.
After working in the Human Resources consulting world for a number of years, I was incredibly familiar with the value that personality, cognitive and behavioral inventories add to the selection process, when used appropriately.