Discrimination Learning Psychology 3906 Introduction Discrimination and classification

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Discrimination Learning Psychology 3906

Discrimination Learning Psychology 3906

Introduction • Discrimination and classification can lead to many things • Recognition – Kin

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

Some basics • Sign stimuli and sticklebacks • Many stimuli together, might get heterogeneous

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

Classification • Objectss/attributes may be discriminable but, may not control behaviour • Additivity or

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

Learned discrimination • • Songbirds Marler et al Stats, psychophysics and field biology Jeff

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

Mimicry • Some insects are aposematic and successful, why not copy? – Batesian mimicry

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

Mullerian Mimicry • In Mullerian mimicry, all species that share a colouration are dangerous

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!

Peak Shift

Peak Shift

OK, so that is odd • Why does that happen? • Excitatory gradient •

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

Bird brain is not an insult • • • Concept learning Natural needed? How

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

Categories and Concepts • • • Hernstien and tree vs non tree Go no

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?

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