Posted By:
Scot Reader
Ray,
I'll take a stab at this. My survey data show the following:
150/350 group: 42 EPDG seen / 141 subjects in group = .30 per subject
350-only group: 51 EPDG seen / 207 subjects in group = .25 per subject
350/460 SP group: 5 EPDG seen / 6 subjects in group = .83 per subject
350/460 RP group: 20 EPDG seen / 55 subjects in group = .36 per subject
460-only group: 7 EPDG seen / 48 subjects in group = .15 per subject
So, EPDG difficulty is probably about the same across the various subject groups except that subjects in the 350/460 SP group are probably somewhat easier and subjects in the 460-only group are probably somewhat tougher.
Of course, this analysis assumes that all subjects in these groups are possible with EPDG. I didn't account for the no-prints.
Scot