People tend to notice items if they capture their attention in some way. If the object isn't visually prominent or relevant, there is a higher chance that a person will miss it. Mental workload and working memory Mental workload is a person's cognitive resources. The amount of a person's workload can interfere with processing of other stimuli. When a person focuses a lot of attention on one stimulus, he/she focuses less attention on other stimuli. For example, talking on the phone while driving – the attention is mostly focused on the phone conversation, so there is less attention focused on driving. The mental workload could be anything from thinking about tasks that need to be done to tending to a baby in the backseat. When people have most of their attention focused on one thing, they are more vulnerable to inattentional blindness. However, the opposite is true as well. When a person has a very small mental workload – he/she is doing an everyday task – the task becomes automatic. Automatic processing can lessen one's mental workload, which can lead to a person to missing the unexpected stimuli. Working memory also contributes to inattentional blindness. Cognitive psychologists have examined the relationship between working memory and inattention, but evidence is inconclusive. The rate of this phenomenon can be impacted by a number of factors. Researchers have found evidence for a number of components that may play a role. These include features of the object and the current task, where an individual's attention lies relative to the object, and mental workload as mentioned above. Researchers Kreitz, Furley, and Memmery in 2015, asserted that working memory capacity is not an indicator of susceptibility to inattentional blindness. Instead, it is a combination of what stimulus the attention is directed to as well as the individual's personal expectations. There are individual differences that can play a role, but some argue those disparities are separate from capacity for working memory. On the other hand, there are researchers who consider differences between individuals and their working memory capacity to be a stronger determinant of inattentional blindness. Seegmiller, Watson, and Strayer in 2011 for example, studied individual differences in working memory capacity and how that overall impacted their attention on a given task. They utilized the same Invisible Gorilla video Simons and Chabris did (as mentioned above), but they additionally had participants complete a mathematics test to measure