Dear Bruce,
thanks a lot for checking.
Thus, Drake's P-40 score is either
- 14 [13+2] of a total of 19 [18+2] according to Shores and Williams (1994),
- 16 [15+2] of a total of 21 [20+2] according to Shores (1999),
- 14 [13+2] of a total of 21 [20+2] according to Thomas (2002) or
- 18 [17+2] of a total of 25 [23+4] according to himself and Shores (2009).
Which is the most valid ?
Michael