Well, there isn't a lot of tooltips in the game yet and except from Productivity it might be quite difficult to figure out what increasing your Perception by 1 exactly means. So, if you are like me and really like to min - max your character as far as it goes you might already have asked yourself how exactly the primary attributes translate into the secondary ones.

So, this guide gives you a list what 1 point in the corresponding main attribute changes in your secondary ones. I only list the affected secondary attributes. So if you don't see e.g. ability to learn under the Strength Tab that means that Strength doesn't affect your characters ability to learn.

Strength

+ 0.5 Health
+ 0.25 Damage
+ 1% excellent genes
+ 0.125 Regeneration

Dexterity

+ 0.5 Health
+ 1% Productivity
+ 0.5 Defence
+ 0.5 Resistance
+ 0.5% Speed
+ 0.75 Entertainment

Intelligence

+ 1.5% Productivity
+ 0.25 Bonus when bargaining
+ 2% Ability to learn
+ 1.75 Medicine
+ 0.3% excellent genes

Perception

+ 0.5 Stealth
+ 0.5 Attack Power
+ 0.25 Damage
+ 1 Resistance
+ 0.5 Medicine

Charisma

+ 0.25 Bonus when bargaining
+ 7.5 Reputation gain
+ 2 Ability to gain influence
+ 0.25 Intimidation
+ 1 Entertainment

Also corresponding to the stats there is another thing that might be nice to know: The roguery skills give buffs to certain stats as follows:

Gravedigger + 1 Intimidation
Robber + 1 Strength
Minstrel + 1% Reputation gain

Hope it helps you all out!