Partly. The readiness to take a stand, voice an unpopular opinion and face what is uncomfortable is a trait: people differ in it consistently, and it can be measured by self-report. A single brave act is a different thing.
Where the scale comes from
The ten statements are the IPIP valour, bravery and courage scale, written to match the bravery strength in the character strengths classification. The IPIP key page lists eleven and marks one as omitted from the scored version, so the site keeps the ten it scores, such as Have taken frequent stands in the face of strong opposition and Can face my fears, with reversed statements such as Do not stand up for my beliefs. You rate each on five points, the reversed ones are flipped, and the ten are added, so a score runs from 10 to 50. The IPIP key page gives coefficient alpha of .75 for the scale, the lowest of the site’s single-trait scales. No norms have been published for it on its own.
What the research finds
Rate, Clarke, Lindsay and Sternberg (2007) asked people what they meant by courage and found four things in common: a deliberate choice, a substantial risk to the person acting, a worthy aim, and the presence of fear rather than its absence. By that definition courage is an act. What the scale measures is how often a person says they act that way, which is a disposition.
The site lists the test under extraversion because the statements are about speaking up and acting in front of others, which is close to assertiveness. Whiteside and Lynam (2001) found that the appetite for risk and thrill is a separate thing, tied to the excitement-seeking facet of extraversion, and it is not what the courage statements ask about.
What it is not
It is not fearlessness. The statement is Can face my fears, and people count an act as courageous only when fear was present. A calm temperament is a different trait, which the emotional stability guide covers.
It is not physical daring or risk-taking. That is excitement-seeking.
It is not aggression or contrariness. Taking a stand against opposition is not the same as seeking opposition.
A low score is not cowardice. Low scorers choose their battles, and the scale cannot say what they would do when it mattered most.
What it means for your results
A high score means you tend to say the unpopular thing and face discomfort; a low score means you tend to avoid awkward situations and keep an unpopular view to yourself. With no norms for the scale alone, the marker shows where your answers fell in the possible range, not where you stand against other people. The 120-item Big Five test scores assertiveness and excitement-seeking separately, against a sample of over 400,000 people.
The courage test takes two minutes, is scored on your device and shows your score on the strip.