  Convection and turbulence in stellar atmospheres have a significant effect on
the emergent flux from A-type stars. The recent theoretical advancements in
convection modelling have proved a challenge to the observers to obtain
measurements with sufficient precision and accuracy to allow discrimination
between the various predictions.
  A discussion of the current observational techniques used to evaluate the
various convection theories is presented. These include filter photometry,
spectrophotometry, hydrogen lines, and metal lines. The results from these
techniques are given, along with the successes and limitations.
