1. Discrimination Learning Psychology 3906

2. Introduction Discrimination and classification can lead to many things Recognition –Kin –food Fights mating

3. Some basics Sign stimuli and sticklebacks Many stimuli together, might get heterogeneous summation Sometimes more extreme values are responded to –Supernormal stimulus With experience you can get perceptual sharpening

4. Classification Objectss/attributes may be discriminable but, may not control behaviour Additivity or interaction can occur Non natural objects may be the best! Motivation can play a huge role

5. Learned discrimination Songbirds Marler et al Stats, psychophysics and field biology Jeff Cynx has shown that the reproductive condition of the listner matters

6. Mimicry Some insects are aposematic and successful, why not copy? –Batesian mimicry Colouration is similar to toxic species, but the prey item is not toxic

7. Mullerian Mimicry In Mullerian mimicry, all species that share a colouration are dangerous Many snakes use this Also may have characteristics that make prey look like a predator!

8. Peak Shift

9. OK, so that is odd Why does that happen? Excitatory gradient Inhibitory grandient As the Violent Femmes would say, you gotta add it up

10. Bird brain is not an insult Concept learning Natural needed? How long lasting Delius (1982) Honig and Stewart (1988) The field of comparative cognition really grew out of much of this stuff

11. Categories and Concepts Hernstien and tree vs non tree Go no go New slides, better than chance Real vs pseudocategories Once you get the behaviour, go after the contents Features? Prototypes?