Internet References

CLT explnation use for website description for participants
http://en.wikipedia.org/wiki/Cognitive_load

Likert Scale
http://www.socialresearchmethods.net/kb/scallik.php
http://www.getfeedback.net/kb/Choosing-the-optimium-feedback-scale
http://en.wikipedia.org/wiki/Likert_scale

Statistic references
Why P=0.05? http://www.jerrydallal.com/LHSP/p05.htm

Statistical hypothesis testing
http://en.wikipedia.org/wiki/Statistical_hypothesis_testing

Critical values of chi-square
http://www.itl.nist.gov/div898/handbook/eda/section3/eda3674.htm