Supplemental Material for
A Person-Centered Approach to Action-Control Beliefs of Students With Special Educational Needs and Their Relation to Student Performance and Time on Task
Laura Nyman 
, Satu Koivuhovi, Samuel Greiff, Risto Hotulainen, Todd D. Little, and Mari-Pauliina Vainikainen Journal of Educational Psychology,
Vol.
118,
No.
3,
pp.
421–443
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