merged @psznb additions for psychology experiment

tidy up @tlodge gaecatalog branch droppings

end-of-line for @tlodge rework as basis for @psznb 'experiment' version

start of @tlodge rework of @jog catalog

end-of-line for @jog initial version

tidy up @tlodge gaecatalog branch droppings

merged @psznb additions for psychology experiment