1. Sense of Challenge, Threat, Self-Efficacy, and Motivation of Students Learning in Virtual and Blended Courses. Issue 1 (2nd January 2019) Authors: Zilka, Gila Cohen; Rahimi, Ilan Daniels; Cohen, Revital Journal: American journal of distance education Issue: Volume 33:Issue 1(2019) Page Start: 2 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗