Rejection was based on 19th century view
Reflex interaction and modulation
S-R Reflexes S-R units can interact
Reciprocal inhibition
Crossed extension reflex
Modulation, selection and gating
The omission of a signal can provide information
Complexities in deriving the underlying causal system
Learning within a lattice hierarchy
Learning can occur at multiple levels within the system
Generalization will vary with level
Wickens experiment
Implications for preparedness
Interations among higher level (motivational) units
Stimuli can act as releasers
Regulation
Oscillation
Fatigue and autonomous activation
From reflexes to information processing
