The authors reported that adults from diverse cultures (Norway & Puerto Rico) hold attitudes toward cluttering that are similar, but somewhat less positive, than their attitudes toward stuttering, and that adults can identify cluttering among people they know, although less commonly than stuttering. Design controls in this study assured that consideration of stuttering did not affect either the attitudes or identification results for cluttering.
St. Louis, Kenneth O., Sonsterud, Hilda, Carlo, Edna J., Heitmann, Ragnhild R., and Kvenseth, Helene. (2014). Public attitudes toward—and identification of—cluttering and stuttering in Norway and Puerto Rico. Journal of Fluency Disorders. DOI: 10.1016/j.jfludis.2014.05.005