Skinner’s classification

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Presentation transcript:

Skinner’s classification Involuntary Voluntary Respondent Operant Elicited Emitted Can be altered by classical conditioning Can be altered by operant (Not until chapter 4)

Motor vs. orienting responses Tropisms phototropisms (+ or -) geotropisms (+ or -) chemotropisms (+ or -) etc.

Behavior Respondents Operants Reflexes Tropisms Skeletal Autonomic

A monosynaptic reflex: example 1 Afferent (sensory) neuron Interneuron Hot object Efferent (motor) neuron Spinal cord Direction of impulse Muscle contracts and withdraws part being stimulated

A monosynaptic reflex: example 2 Cross-section of spinal cord Sensory neuron Motor neuron Interneuron Muscle

Actual threshold = 26 stimulus units The reflex threshold 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 10 20 30 40 50 Intensity of stimulus Probability of response Step function (like the axon of the neuron) Ogive Actual threshold = 26 stimulus units Actual Idealized (all-or-none)