Published Conference Proceedings - Paper
Video for the masses: a further study into the effectiveness of low quality streamed video
Griffiths, L & Thornhill, S & Tsolakis, P 2005, Video for the masses: a further study into the effectiveness of low quality streamed video, in: 'Proceedings of HCII 2005: 11th International Conference on Human-Computer Interaction', Lawrence Erlbaum Associates, Inc (LEA), Las Vegas, USA. Conference details: HCII 2005.
This paper describes a laboratory study that was conducted to explore whether subtly different low quality and low bit-rate streamed video would contribute to the pedagogical effectiveness of video material and whether there was a measurable difference. The work is an extension of a previous study carried out by the authors (Griffiths, Thornhill, & Tsolakis, 2003) in an attempt to further understand usability issues of very low bandwidth streamed video and attempt to discover a threshold for unacceptable video quality.
Around 80 test subjects were split into two control groups (ultra low 34Kbps and low 80Kbps bit-rate video) to view a video documentary and were given test questions to answer that related to its content.
The results ofthe study indicate that overall there was no significant difference in the test scores between the groups.
These findings would suggest that even ultra low bit-rate (34Kbps) streamed video is sufficient for all but the most visually detailed or dependant educational material and that this bit-rate could be deemed acceptable and effective over typical home user (v.90 - 56Kbps) dialup Internet access and Internet enabled mobile devices.
Griffiths, L & Thornhill, & Tsolakis, eds. 2005, Proceedings of HCII 2005: 11th International Conference on Human-Computer Interaction, Lawrence Erlbaum Associates, Inc (LEA), Las Vegas, USA.