Erich Hartmann

Phonological awareness in preschoolers with spoken language impairment: toward a better understanding of causal relationships and effective intervention. a constructive comment on Rvachew and Grawburg's (2006) study.

Erich Hartmann, 2008, Journal of speech, language, and hearing research : JSLHR.

Paired Reading with parent or volunteer tutors: Do implementation, process features, or tutor characteristics explain differential effects?

Alois Niggli, L. Torchetti, Annette Tettenborn, 2022, International Journal of Educational Research.

Effectiveness of an extracurricular program for struggling readers: A comparative study with parent tutors and volunteer tutors

Isabelle Hugener, Alois Niggli, Annette Tettenborn, 2019, Learning and Instruction.