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The Positive and Negative Affect Schedule — PANAS — is one of the most widely used measures of mood in psychology. Its central idea is stranger than it first sounds: feeling good and feeling bad are not opposite ends of one scale. They are two separate scales, and you can be high or low on both at once.
In short
- Published by Watson, Clark and Tellegen in 1988 in the Journal of Personality and Social Psychology.
- 20 adjectives — 10 describing positive affect, 10 describing negative affect.
- Each is rated 1 to 5, so each subscale runs from 10 to 50. The two are scored separately and never combined.
- The time frame is adjustable: right now, today, the past week, or in general.
What PANAS measures#
PANAS measures affect — the felt, moment-to-moment texture of emotion, as distinct from mood disorders or personality traits. It does this with a deceptively simple format: a list of twenty adjectives, each rated for how strongly it applies over a stated period.
Ten of those adjectives load onto Positive Affect (PA) — the dimension covering enthusiasm, alertness and engaged energy. High PA is active pleasure; low PA reads as flatness and lethargy rather than distress.
The other ten load onto Negative Affect (NA) — subjective distress and unpleasant arousal, spanning anger, guilt, fear and nervousness. High NA is aversive engagement; low NA is calm rather than joy.
Why two dimensions instead of one#
The intuitive model of mood is a single dial running from miserable to delighted. PANAS is built on the finding that this model is wrong, or at least badly incomplete.
Across large samples, positive and negative affect turn out to be only weakly correlated. They rise and fall largely independently, respond to different things, and predict different outcomes. That independence is the scale's entire architecture, and it is what a single-dial mood tracker structurally cannot represent.
| Positive affect | Negative affect | What it tends to look like |
|---|---|---|
| High | Low | Engaged, energised, absorbed |
| Low | High | Distressed, depleted, under strain |
| High | High | Activated and conflicted — common under high-stakes pressure |
| Low | Low | Flat and disengaged — quiet, and easy for everyone to miss |
That last row is the one that matters most in practice. Low positive affect with low negative affect produces no drama and no complaint. On a single happy-to-sad dial it registers as an unremarkable middle. As two dimensions it is unmistakable — and it is one of the states worth noticing earliest.
A flat week and an average week look identical on one axis and nothing alike on two.
How it is scored#
Each of the twenty items is rated on a five-point scale, from very slightly or not at all to extremely. The ten positive items are summed for a PA score and the ten negative items for an NA score.
- Each subscale ranges from 10 to 50.
- The two subscales are reported separately — there is no single PANAS total, by design.
- Both subscales report good internal consistency across published samples.
- Interpretation is comparative: against a person's own history, or against a matched reference sample. There is no universal cutoff.
The instructions carry as much weight as the items. The same twenty adjectives measure a state when the window is "right now" and something much closer to a trait when it is "in general". Changing the time frame changes what the scale is measuring — which is why comparing scores collected under different instructions is meaningless.
Variants#
- PANAS — the original 20-item schedule, and still the default in most research.
- PANAS-X — an expanded form from Watson and Clark that adds lower-order scales for specific affects such as fear, hostility, guilt, sadness, joviality and serenity, at the cost of considerably more items.
- I-PANAS-SF — a shortened international form developed for cross-cultural use and for settings where a 20-item schedule is too long to administer repeatedly.
The trade is consistent across all three: more items buy finer discrimination, fewer items buy the ability to ask often. For anything measured daily, the second usually matters more than the first.
Limits worth knowing#
- Self-report. PANAS records what a person notices and is willing to record. Both vary with the very states being measured.
- Adjective comprehension varies. Words like jittery or proud do not translate cleanly across languages or age groups, which is part of why the international short form exists.
- It is not a screener. PANAS was not designed to detect depression or anxiety disorders and should not be used as if it were. That is the PHQ-9's job.
- Repetition dulls it. Answered daily for months, adjective checklists drift toward habit. Anything built on PANAS has to account for that.
Why the two-dimensional model matters#
Most everyday mood tracking — the emoji picker, the one-to-ten slider, the smiley face in a wellbeing survey — collapses affect onto a single axis running from bad to good. PANAS is the standing argument that this loses something important.
What it loses is the distinction between a week that is genuinely difficult and a week that is merely empty. High negative affect is visible: it produces complaint, conflict, obvious distress. Low positive affect with low negative affect produces none of that. On a single dial it reads as a perfectly ordinary middling score.
Those two states call for completely different responses, and only one of them announces itself. That is the practical case for measuring affect on two axes rather than one, and it is why PANAS has stayed in use for nearly four decades.
Common questions#
- What does the PANAS scale measure?
- PANAS measures affect across two independent dimensions: Positive Affect, covering enthusiasm, alertness and engagement, and Negative Affect, covering distress and unpleasant arousal. It uses twenty adjectives, ten for each dimension, rated on a five-point scale.
- What is a good PANAS score?
- There is no universal cutoff. Each subscale runs from 10 to 50 and is interpreted comparatively — against a person's own previous scores, or against a matched reference sample. Higher positive affect and lower negative affect are generally more favourable, but the meaningful signal is change over time.
- Why are positive and negative affect measured separately?
- Because research consistently finds them only weakly correlated. They rise and fall largely independently, so a person can be high on both at once, or low on both. Combining them into a single score would hide states such as low positive affect with low negative affect, which presents as flatness rather than distress.
- Who created the PANAS scale?
- David Watson, Lee Anna Clark and Auke Tellegen, published in 1988 in the Journal of Personality and Social Psychology. Watson and Clark later developed the expanded PANAS-X form.
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