Strohmaier, A. R., A. Schiepe-Tiska, and K. M. Reiss. “A Comparison of Self-Reports and Electrodermal Activity As Indicators of Mathematics State anxiety.: An Application of the Control-Value Theory”. Frontline Learning Research, vol. 8, no. 1, Feb. 2020, pp. 16-32, doi:10.14786/flr.v8i1.427.