Rapid discriminated bar-press avoidance through avoidance shaping

Facilitation or Bar-press Avoidance by Hand during the Intertrial Interval

Experiment 1 demonstrated that handling rats prior to the start of a trial greatly facilitated bar-press avoidance learning. Although Ss which were also allowed to escape the training chamber following a bar press performed well, they were not significantly better than those Ss receiving handling only. Experiment 2, using concomitant measures of freezing and bar holding, investigated the effect...

Rapid jamming avoidance in biosonar.

The sonar systems of bats and dolphins are in many ways superior to man-made sonar and radar systems, and considerable effort has been devoted to understanding the signal-processing strategies underlying these capabilities. A major feature determining the efficiency of sonar systems is the sensitivity to noise and jamming signals. Previous studies indicated that echolocating bats may adjust the...

Obstacle Avoidance through Reinforcement Learning

A method is described for generating plan-like, reflexive, obstacle avoidance behaviour in a mobile robot. The experiments reported here use a simulated vehicle with a primitive range sensor. Avoidance behaviour is encoded as a set of continuous functions of the perceptual input space. These functions are stored using CMACs and trained by a variant of Barto and Sutton's adaptive critic algorith...

Inbreeding avoidance through mate choice

Optimal foraging by bacteriophages through host avoidance.

Optimal foraging theory explains diet restriction as an adaptation to best utilize an array of foods differing in quality, the poorest items not worth the lost opportunity of finding better ones. Although optimal foraging has traditionally been applied to animal behavior, the model is easily applied to viral host range, which is genetically determined. The usual perspective for bacteriophages (...