The perceptual basis of the modality effect in multimedia learning
Journal of Experimental Psychology Applied (2011) - Comment
pubmed: 21604912  doi: 10.1037/a0023588  issn: 1939-2192  issn: 1076-898x 

Ralf Rummer, Judith Schweppe, Anne Fürstenberg, Katharina Scheiter, Antje Zindler