Virtual discrete trial training for teacher trainees. - Berglind Sveinbjörnsdóttir; Snorri Hjörvar Jóhannsson; Júlía Oddsdóttir; Tinna Þuríður Sigurðardóttir; Gunnar Ingi Valdimarsson; Hannes Högni Vilhjálmsson (J. Multimodal User Interfaces, 2019)