Dexterity Attribute
The proper use of one's hands.
Dexterity determines how skillful you are in performing everyday and/or complicated actions. Is raised by: calorie deficiency (losing weight). Is lowered by: calorie sufficiency (gaining weight). It influences: movement speed and action speed including crafting, eating and reloading. Ranges from 1 to 5.

Thievery Skill
Thievery is a skill that determines how well you can pick locks. Is raised by: lockpicking in general, both successfully and unsuccessfully. It influences: time available per lockpicking attempt, level of pressure applied before lockpicks break.

Demolition Skill
Demolition is a skill that indicates how knowledgeable you are about the use of explosives. Is raised by: arming and disarming explosives / practice traps. It influences: number of materials needed for crafting explosives,explosive defuse time, defuse attempts, quality of armed explosives, explosive damage, trigger radius and unlocks crafting recipes.

Stealth Skill
Stealth is the skill of moving cautiously, silently and slowly to prevent others from hearing you. Is raised by: moving while in crouch or prone position It influences: sound produced while moving

Driving Skill
Driving is a skill that enables you to drive ground vehicles with four or more wheels as well as those with tracks and hovercraft. Is raised by: driving for an extended amount of time. It influences: vehicle stalling frequency, maximum attainable speed, acceleration, steering.

Motorcycling Skill
Motorcycling is a skill that enables you to drive ground vehicles with two or three wheels. Is raised by: driving for an extended amount of time. It influences: vehicle stalling frequency, maximum attainable speed, acceleration, steering.

Aviation Skill
Aviation is a skill that determines a pilot’s ability to safely and effectively operate aircraft. Is raised by: piloting aircraft for extended periods of time. It influences: overall aircraft handling, stability, responsiveness, and the ability to maintain control during demanding flight conditions.
Official SCUM in-game content (the game’s own text, translated by the studio).