1. Sense Perception Some examples & some questions

2. Study the picture which will appear below.What do you notice? (Dont tell everyone!)

3. Look at the toast carefully..what do you see?

4. Already we have two issues to bear in mind when assessing sense perception as a way of knowing We may fail to see something that is there We may see something that is (possibly) not there

5. More problems Think about why the following images are problematic

6. PARIS IN THE THE SPRINGDid you see what was there, or whatyou expected to see?

7. Do you perceive what you see?

8. Do you see what you perceive?

9. Moving pictures can also be problematic http://www.youtube.com/watch?v=sKa0eaKsdA0http://www.youtube.com/watch?v=jP_jYmbke14 http://www.michaelbach.de/ot/mot_adapt/index.html

10. Concentrate on the cross in the middle, after a while you will notice that this moving purple dot will turn green! What happens after youve looked at the cross a bit longer ?

11. On the other hand, motion may clarify what we see picture 1 picture 2

12. What causes these problems? Context may mislead us There may be different, but equally valid interpretations of what we see We may see something only when someone else tells us it is there We jump to conclusions, seeing what we expect to see We impose order on what we see

13. Are there similar problems with our other senses? taste smell touch hearing any other senses

14. Some sound problems http://asa.aip.org/demo27.html http://jeffmilner.com/backmasking.htm

15. There is some reading for you to take awayabout sense perception for bats.

16. Conclusions? The sensations we experience are subject to the limitations of the bodys sensory systems and may not therefore be a true representation of the external worldExamples could include frequency limitations for hearing which vary with species or individual sight limitations such as colour-blindness or lack of focus psychological effects may cause sensations without an external cause. temporary confusion may be induced by conflicting messagesor we may overinterpret what we sense!

17. We could sayOur internal constructions may differ from the external world or The eye is not a camera