Extra Effort Costs for Psionic Powers - pls help
 

Hey!

Page 7 of GURPS Psionic Powers says following:
I don't get what it means by "10% increase in level". 10% of what? Point cost?
I don't get how it was calculated that extra effort from 4 to 5 here costs 25%.

Can somebody clarify this rule to me, please.

P.S. How do I calculate extra effort to get from 1 to 5? From 4 to 9? Can you walk me through it?

Re: Extra Effort Costs for Psionic Powers - pls help
 

It works on the numerical levels, which Psionic Powers happen to use, though most of GURPS does not. You calculate it as 100% (higher/lower -1), so 5 is 1.25 (125%) x 4, or a 25% increase. 5 is 5.00 (500%) x 1, or a 400% increase. 9 is 2.25 x 4, or a 125% increase.

Re: Extra Effort Costs for Psionic Powers - pls help
 

Thank you!

Re: Extra Effort Costs for Psionic Powers - pls help
 

So, a consequence of this, as I understand it, going from Ability level 10 to 11 has a trivial -1 penalty, while from 1 to 2 gives almost impossible to beat -10 without a substantial Will or skill investment.

Re: Extra Effort Costs for Psionic Powers - pls help
 

That's as I understand it. As with enhancing attributes, it ensures that you can't simply buy the first level of various abilities and rely on boosting them to full power. The psi rules are actually more generous, normal Extra Effort being -1 per 5% increase.

The system of levels does create a few break points where a high-Will character can save points by taking that risk. E.g. Damage Control 3 is 32 points, DC4 jumps to 64 points but is only a 33% increase in level, so if you're only occasionally dealing with (say) burning damage, you can save your points and gamble on making the roll to halve it.
(for those without Psionic Powers, DC3 doesn't help with burning, while DC4 halves it)