The measurement instruments

The level of distress or anxiety the person feels here and now, as they rate it themselves.

How true a positive self-belief feels — beyond intellectual knowledge, the gut-level sense of it.

The patient’s overall well-being — individual, relational, social and general — tracked from one session to the next.

The quality of the therapeutic alliance as the patient experiences it: bond, agreement on goals and on method.

The patient’s subjective position on their own path — progress, confidence, motivation — and the next realistic step.

Two dimensions of ambivalence about change: how much it matters to the person, and how able they feel to do it.

The intensity of depressive symptoms experienced over the past two weeks.

The severity of generalized anxiety symptoms over the past two weeks.

The intensity of depressive symptoms, both cognitive and somatic.

Anxiety and depression, designed for medical settings (it avoids physical items that mislead in the physically ill).

Three distinct negative states — depression, anxiety and tension/stress — measured separately.

Hopelessness — negative expectations about the future — a key indicator of suicide risk.

The degree to which life situations over the past month are appraised as stressful, unpredictable and uncontrollable.

Two forms of anxiety: state anxiety (present moment) and trait anxiety (enduring disposition).

Positive subjective well-being over the past two weeks — mood, vitality, interest — without pathologising.

Dispositional mindfulness across five facets: observing, describing, acting with awareness, non-judging, non-reactivity.

The capacity to treat oneself kindly in failure and suffering: self-kindness, common humanity, mindfulness.

Global self-esteem: the sense of personal worth.

Two independent dimensions of mood: positive affect and negative affect.

Psychological flexibility and experiential avoidance, the central process of ACT.

The subjective feeling of loneliness and social isolation.

Psychological distress related to climate change: rumination, cognitive and functional impairment.

The severity of depression, rated by the clinician during an interview.

The severity of anxiety (psychic and somatic), rated by the clinician.

The severity of depression, designed to be highly sensitive to change under treatment.

The severity of obsessive-compulsive disorder, independently of the content of the obsessions.

The presence and severity of suicidal ideation and behaviour.

The presence and intensity of post-traumatic stress symptoms according to DSM-5 criteria.

The subjective impact of a traumatic event: intrusion, avoidance, hyperarousal.

Hazardous, harmful or dependent alcohol use.