Objectives:

• Revise the basics of t-tests:

• from descriptive to inferential statistics
• hypothesis testing
• basics of the t-statistic
• t-test with two related samples
• t-test with two independent samples

• carry out a simple experiment: measuring the strength of a visual illusion
• analyse the data with inferential statistics: t-tests
• write a lab report …

revision : t-tests		session 1 (Nov 18)
background on Muller-Lyer Illusion		session 2 (Nov 25)
run the experiment		session 1 (Nov 18)
analyse the experimental data		session 2 (Nov 25)

• description of background and experiment, plus accompanying material: http://www.pc.rhul.ac.uk/zanker/teach/PS101/ttst2002/ttst2002.htm
• chapters 9-11 of Gravetter & Wallnau 5^th ed. 2000
• R.L.Gregory 1968 'Visual illusions' Scientific American 219:66 (resources room)
• S.Coren & J.S.Girgus 1978 'Visual illusions' In: 'Handbook of Sensory Physiology VIII' R.M.Held et al. ed., Springer, Berlin Heidelberg New York, 549-568 (612.8 HAN) (resources room)