Intelligence/Fallout 76

Intelligence is one of the seven primary statistics in the SPECIAL system.

Gameplay
Modifies: Item Condition and Durability, Ability to Hack Terminals, and Scrapping Return

Raising Intelligence decreases the number of words when hacking terminals. At an Intelligence of 1, there is a +0% crafted item condition bonus. Each additional level of Intelligence increases this condition bonus by +5%, except for the jump from Intelligence = 4 to Intelligence = 5, where the bonus increases by +10%. At the maximum Intelligence of 15, the crafted item condition bonus is +75%.

Increase
Note that all stat boosts in Fallout 76 are temporary.
 * Bobblehead: Intelligence (+2 for 1 hour or 2 hours with Curator)
 * Armor and clothing:
 * "Casual" underarmor with a treated lining mod (+1)
 * "Casual" underarmor with a resistant lining mod (+1)
 * "Vault suit" underarmor with a resistant lining mod (+2)
 * "Casual" underarmor with a protective lining mod (+1)
 * "Vault suit" underarmor with a protective lining mod (+2)
 * "Casual" underarmor with a shielded lining mod (+3)
 * "Vault suit" underarmor with a shielded lining mod (+2)
 * Legendary Effects:
 * Intelligence (+1)
 * Mutations:
 * Egg Head (+6)
 * Herd Mentality (+2 if grouped, -2 if solo)
 * Perks:
 * Night Person (+1 to +3 during the night)
 * Consumables:
 * Food:
 * Brain bombs (+3)
 * Brain fungus soup (+2)
 * Broiled scorchbeast brain (+3)
 * Owlet nuggets (+1)
 * Scorchbeast mixed meat stew (+1)
 * Drinks:
 * Simple aster tea (+1)
 * Steeped aster tea (+2)
 * Chems:
 * Berry Mentats (+5)
 * Daddy-O (+3)
 * Mentats (+2)
 * X-cell (+2)

Scrapping Yield
A higher level of Intelligence increases the return from scrapping items.

Low
Low Intelligence checks are involved in situations where characters with low Intelligence are granted other dialogue options, often relating to their low intellect. Checks range from +4 to even negative Intelligence, going from -1 to -7.