[skills]

Perception (Wis)

Detail Perception
DC
Hear the sound of battle
–10
Notice the stench of rotting garbage
–10
Detect the smell of smoke
0
Hear the details of a conversation
0
Notice a visible creature
0
Determine if food is spoiled
5
Hear the sound of a creature walking
10
Hear the details of a whispered conversation
15
Find the average concealed door
15
Hear the sound of a key being turned in a lock
20
Find the average secret door
20
Hear a bow being drawn
25
Sense a burrowing creature underneath you
25
Notice a pickpocket
Opposed by
Sleight of Hand
Notice a creature using Stealth
Opposed by
Stealth
Find a hidden trap
Varies by trap
Identify the powers of a potion through taste
15 + the potion's
caster level
Perception Modifiers DC Modifier
Distance to the source, object, or creature
+1/10 feet
Through a closed door
+5
Through a wall
+10/foot of
thickness
Favorable conditions1
–2
Unfavorable conditions1
+2
Terrible conditions2
+5
Creature making the check is distracted
+5
Creature making the check is asleep
+10
Creature or object is invisible
+20
1 Favorable and unfavorable conditions depend upon the sense being used to make the check. For example, bright light might increase the DC of checks involving sight, while torchlight or moonlight might give a penalty. Background noise might reduce a DC involving hearing, while competing odors might penalize any DC involving scent.
2 As for unfavorable conditions, but more extreme. For example, candlelight for DCs involving sight, a roaring dragon for DCs involving hearing, and an overpowering stench covering the area for DCs involving scent.

Your senses allow you to notice fine details and alert you to danger. Perception covers all five senses, including sight, hearing, touch, taste, and smell.

Check

Perception has a number of uses, the most common of which is an opposed check versus an opponent's Stealth check to notice the opponent and avoid being surprised. If you are successful, you notice the opponent and can react accordingly. If you fail, your opponent can take a variety of actions, including sneaking past you and attacking you.

Perception is also used to notice fine details in the environment. The DC to notice such details varies depending upon distance, the environment, and how noticeable the detail is. The following table gives a number of guidelines.

Action

Most Perception checks are reactive, made in response to observable stimulus. Intentionally searching for stimulus is a move action.

Try Again

Yes. You can try to sense something you missed the first time, so long as the stimulus is still present.

Special

Elves, half-elves, gnomes, and halflings receive a +2 racial bonus on Perception checks.

Creatures with the scent special quality have a +8 bonus on Perception checks made to detect a scent. Creatures with the tremorsense special quality have a +8 bonus on Perception checks against creatures touching the ground and automatically make any such checks within their range.

A spellcaster with a hawk or owl familiar gains a +3 bonus on Perception checks.

If you have the Alertness feat, you get a bonus on Perception checks.

Read Lips

To understand what someone is saying by reading lips, you must be within 30 feet of the speaker, be able to see him or her speak, and understand the speaker's language. (This use of the skill is language-dependent.) The base DC is 15, but it increases for complex speech or an inarticulate speaker. You must maintain a line of sight to the lips being read.

If your check succeeds, you can understand the general content of a minute's worth of speaking, but you usually still miss certain details. If the check fails by 4 or less, you can't read the speaker's lips. If the check fails by 5 or more, you draw some incorrect conclusion about the speech. The check is rolled secretly in this case, so that you don't know whether you succeeded or missed by 5.

Perception Skill Unlocks

Pathfinder Unchained
With the Signature Skill feat and sufficient ranks in Perception, you earn the following.

5 Ranks: You remain alert to sounds even in your sleep, and the normal DC increase to Perception checks when you are sleeping is halved. The distance modifier on the DC of Perception checks you attempt is reduced to +1 per 20 feet.

10 Ranks: The distance modifier on the DC of Perception checks you attempt is reduced to +1 per 30 feet. In addition, you gain a +5 bonus on Perception checks to notice or locate an invisible creature or object.

15 Ranks: You remain alert to sounds even in your sleep, and the normal DC increase to Perception checks when you are sleeping doesn't apply to you. The distance modifier on the DC of your Perception checks is reduced to +1 per 40 feet.

20 Ranks: You gain a +10 bonus on Perception checks to notice invisible creatures or objects. The distance modifier on the DC of Perception checks you attempt is reduced to +1 per 60 feet.

Read Aura (Occult Skill Unlock)

Occult Adventures
Your psychic sensitivity allows you to read the psychic and magical auras of creatures and objects.

Requirement

Characters capable of casting psychic spells or who have the Psychic Sensitivity feat gain access to this skill unlock. A character must be trained in the appropriate skill to use that skill’s unlock, even if the skill can normally be used untrained. It’s impossible to take 10 for an occult skill unlock. Occult skill unlocks require intense concentration and strenuous effort, so the amount a character can use each skill unlock is limited to once per day or per week. This limit is for all uses of the skill unlock. 

Check

Once per day, you can examine the natural aura of a creature or object to discern the subject's alignment, emotions, health, or magic. This requires 10 minutes of concentration, after which you attempt a Perception check. Each time, you must pick one of four auras to read: alignment, emotion, health, or magic. The result of the check applies only to the selected aura. You must be within 30 feet of the subject at all times during the reading. Objects typically have only magic auras, though some also have alignment auras (and intelligent items have emotion auras). You can still attempt to detect a type of aura an object doesn't have, but you get no results. The DC varies depending on the aura, as shown on the table.

Read Alignment Aura

You attempt to read the alignment aura, learning the alignment and its strength. An alignment aura's strength depends on the creature's Hit Dice or item's caster level, as noted in the description of the detect evil spell.

Read Emotion Aura

The colors within the target's aura reveal its emotional state. If successful, you learn the target's disposition and its attitude toward any creatures within 30 feet of it. For a number of rounds equal to the amount by which you exceeded the skill check's DC, you gain a +2 circumstance bonus on Bluff, Diplomacy, Intimidate, and Sense Motive checks against the target.

Read Health Aura

Viewing the flow of vital force, you assess a creature's physical condition. You learn if the creature is unharmed or wounded, if it is poisoned or diseased, and whether it is affected by any of the following conditions: confused, disabled, dying, nauseated, panicked, staggered, stunned, and unconscious. You also learn the total number of points available in its ki pool, grit pool, or similar resource.

Task DC
Read alignment aura
15 + creature's HD or item's caster level
Read emotion aura
20 + creature's HD or item's caster level1
Read health aura
15 + creature's HD
Read magic aura
20 + creature's HD or item's caster level
Determine level or HD
25 + creature's HD
1Intelligent items only.
Read Magic Aura

You attempt to determine the number and power of all magical auras on a target creature or object (see detect magic to determine a magic aura's power). If the check is successful, you can attempt Knowledge (arcana) or Spellcraft checks to determine the school or identify properties of a magic item, as normal. If the item is affected by magic aura or a similar spell, you can realize this and determine the actual properties of the item if your check result exceeds the DC by 5 or more. If the spell is of a higher level (such as aura alteration), increase this threshold DC by 2 for every spell level beyond 1st.

Action

Reading an aura requires 10 minutes of study.

Try Again

Yes. You can read a creature or object's aura more than once, whether you read the same aura or a different one. You can still attempt only one skill check to read an aura per day.