Other researchers argue that information located in working memory is comprised of contents from long-term memory that are activated. Those who take this stance believe that activation of representations is affected by processes of attentional selection, so constraints on attentional focus limit the capacity of people’s short-term memory. Evidence for this view has also been observed in neuroscience studies. This more general perspective conceives of working memory as not located in a specific brain system, but rather in short-term activation of neural systems that serve other functions, which are coordinated by attention to achieve a goal