  Selected results from recent studies of star formation in galaxies at
different stages of interaction are reviewed. Recent results from the Spitzer
Space Telescope are highlighted. Ideas on how large-scale driving of star
formation in interacting galaxies might mesh with our understanding of star
formation in isolated galaxies and small scale mechanisms within galaxies are
considered. In particular, there is evidence that on small scales star
formation is determined by the same thermal and turbulent processes in cool
compressed clouds as in isolated galaxies. If so, this affirms the notion that
the primary role of large-scale dynamics is to gather and compress the gas
fuel. In gas-rich interactions this is generally done with increasing
efficiency through the merger process.
