1 23 Social Psychology of Education An International Journal ISSN 1381-2890 Volume 17 Number 1 Soc Psychol Educ (2014) 17:19-50 DOI 10.1007/s11218-013-9235-5 A multi-dimensional model of the origins of attitude certainty: teachers’ attitudes toward attention-deficit/hyperactivity disorder Donnah L. Anderson, Susan E. Watt & Dianne C. Shanley