More and more teachers create video explanations for their instruction. Whether or not they are effective for learning depends on the videos' instructional quality. Reliable measures to assess the quality of video explanations, however, are still rare, especially for videos created by (preservice) teachers. We developed such a measure in a…

The rapid development of digital technology and its pervasiveness in everyday life requires everybody to develop the skills necessary to engage with such technology for one's mundane tasks and communication needs. The first steps towards developing these skills can be particularly challenging for older adults, who might need to fundamentally adapt…