It looks like it is only possible to add clips to a selection one at a time using the shift key, whereas in other interfaces sometimes ctrl-click is used to select one clip at a time and shift-click is used to select a range of elements. Am I missing an option somewhere for enabling the latter?
Hold Shift, then drag the mouse. Any clip touched by the drag box is added to the selection.
Ah, hold shift and drag mouse is indeed the answer. Less intuitive compared to what I am trained to do by other interfaces, but works perfectly fine. Thank you!