“…As an example, Sprigg, Stride, Wall, Holman, and Smith (2007) found that psychological strain mediated the relationship between work characteristics and musculoskeletal disorders among call center employees. Several case studies based on this systems-level perspective have been published, with mostly positive outcomes (Heerwagen, 2000;McFall & Beacham, 2006;Pullen, 2001). Suggestive evidence even exists that this more integrative approach to ergonomics design allows certain positive characteristics (e.g., personal control) to counterbalance certain negative features (e.g., distractions; Lee & Brand, manuscript submitted for publication; Moore, Carter, & Slater, 2005;Leather, Beale, & Sullivan, 2003;Thörn, 2000).…”