Item Rarity Sucks

I have about 35% to find rare items using various rings/necklaces. I would think that at 35% I would at least come up with 1 item with rare properties but I just went through a map with nothing special found. I know 35% is not the highest but it's over a 1/3. I've noticed this in the past where I've farmed lower levels with even more rarity enhancements and still nothing.
Is there a formula that I need to figure out? Is it straight up 35% more rarity items found or is it some crazy formula that when all said and done gives it only a small, small percentage?

i had 400% rarity on my sporker and it was oh so noticable

that shouldn't be the way it works. If you have 35% rarity then you should find 35% more rare items. I understand the averages and blah blah blah but 35% is still 35%. It doesn't seem to work that way at all.

Yea, you do find 35% more rare items, but 35% of a low number is still a low number, you can't really expect to get a fountain of rares out of 35%

No fountain expected. 1 maybe I would expect. Boo on this particular "enhancement"

My approach to IIQ/IIR is to never expect anything to drop, that way I am always pleasantly surprised.

I just play Hardcore, where purposefully building iir and iiq can get you killed.

The only cure for this is unfortunately statistics. You're the problem... you're human. You don't see randomness, you see patterns. You see patterns that you expect to see. Keep accurate statistics over time and you'll see that 35% IIR does indeed give you more rare items.

People need to L2RNG.

IIQ/IIR% does not increase numbers the way people think they do (rather, a lack of thought is the problem).

Increased chance. Not amount.

100% IIQ = twice the chance of item dropping, not twice as many items.
100% IIR = twice the chance of item being magic/rare/unique, not twice as many magics/rares/uniques.

I've said this before, but I feel I will have to repeat it again in the future.

Let's say with 0% IIR you will, on AVERAGE, get 1 rare item in clearing a particular area Even though you'd get an AVERAGE of 1 item, there's would be a:
36.8% chance of getting 0 rare items
36.8% chance of getting 1 rare item
18.4% chance of getting 2 rare items
8.0% chance o getting more than 2 rare items

With your 35% IIR, you can similarly expect that you'd get 1.35 items on AVERAGE from the same map each run. This would therefore translate into a:
25.9% chance of getting 0 rare items
35.0% chance of getting 1 rare item
23.6% chance of getting 2 rare items
15.5% chane of getting more than 2 rare items

And just for fun, with 400% IIR, you'd expect:
1.8% chance of getting 0 rare items
7.3% chance of getting 1 rare item
14.7% chance of getting 2 rare items
76.2% chance of getting more than 2 rare items

This is assuming rare drops are independent of each other.

So although 35% IIR WILL increase the likelihood of getting rare items, it's not a huge increase. I'd also say that for most areas, you'd probably find fewer than 1 rare item per map on average anyway, so at least 25.9% of areas you'd run wouldn't give anything. As a previous poster said, you need a lot of IIR for the effects to become REALLY noticable, as with the 400% IIR example