. 2022 Mar 9;8:58. doi: 10.1186/s40814-022-01017-z

Table 2.

Description and psychometric properties of measures of behavioural and involuntariness responses to hypnotic suggestions

Measurement	Goal	Description	Score ranges	Scoring	Duration	Time point	Psychometric properties
Standard SHCS: CHILD form [37]	To measure behavioural responses to hypnotic suggestions for children aged 6–16 years	- Relaxation/eye closure induction; - 7 test suggestions for time regression, visualisation, ideomotor responses, and post-hypnotic suggestions to re-enter hypnosis at hand clap^a	0–7: - Low: 0–2; - Medium: 3–5; - High: 6–7	- 0 if absent or negative behavioural response, - 1 if positive behavioural response [37]	20 mins	Just before and during the 1st dressing change	- Moderate correlation with the Stanford Hypnotic Susceptibility, Form A scale: r = 0.67 [37] - Established concurrent validity [37]
Modified SHCS: CHILD form [37]	To measure behavioural responses to hypnotic suggestions for children aged 4–8 years	- Active induction in which eyes can be open; - 6 test suggestions for time regression, visualisation, and ideomotor responses	0–6: - Low: 0–1; - Medium: 2–4; - High: 5–6
Involuntariness numeric scale [39]	To rate involuntariness and automaticity experienced during the responses to SHCS: CHILD suggestions	Age-appropriate question reworded to children’s age regarding experienced involuntariness during responses to SHCS: CHILD items (did that feel like you made that happen or that it happened by itself?)^b	Mean of items scores	Score ranging from 0 (no response), 1 (voluntary response to suggestions) to 5 (involuntary-automatic enactment) for each SHCS: CHILD test item	10 mins	During the 1st dressing change	- Good internal consistency (αs: 0.76–0.86) [40] - Adequate construct validity: moderate correlation of involuntariness scores with scores on a standardised hypnotic suggestibility scale (r = .49, p < .001, 95% CI = [.31, .65], n = 58) [41]

Measurement

Goal

Description

Score ranges

Scoring

Duration

Time point

Psychometric properties

Standard SHCS: CHILD form [37]

To measure behavioural responses to hypnotic suggestions for children aged 6–16 years

- Relaxation/eye closure induction;

- 7 test suggestions for time regression, visualisation, ideomotor responses, and post-hypnotic suggestions to re-enter hypnosis at hand clap^a

0–7:

- Low: 0–2;

- Medium: 3–5;

- High: 6–7

- 0 if absent or negative behavioural response,

- 1 if positive behavioural response [37]

20 mins

Just before and during the 1st dressing change

- Moderate correlation with the Stanford Hypnotic Susceptibility, Form A scale: r = 0.67 [37]

- Established concurrent validity [37]

Modified SHCS: CHILD form [37]

To measure behavioural responses to hypnotic suggestions for children aged 4–8 years

- Active induction in which eyes can be open;

- 6 test suggestions for time regression, visualisation, and ideomotor responses

0–6:

- Low: 0–1;

- Medium: 2–4;

- High: 5–6

Involuntariness numeric scale [39]

To rate involuntariness and automaticity experienced during the responses to SHCS: CHILD suggestions

Age-appropriate question reworded to children’s age regarding experienced involuntariness during responses to SHCS: CHILD items (did that feel like you made that happen or that it happened by itself?)^b

Mean of items scores

Score ranging from 0 (no response), 1 (voluntary response to suggestions) to 5 (involuntary-automatic enactment) for each SHCS: CHILD test item

10 mins

During the 1st dressing change

- Good internal consistency (αs: 0.76–0.86) [40]

- Adequate construct validity: moderate correlation of involuntariness scores with scores on a standardised hypnotic suggestibility scale (r = .49, p < .001, 95% CI = [.31, .65], n = 58) [41]

^aAnaesthesia suggestion will be incorporated in the ideosensory test suggestion to assess specific responses relevant to hypno-anaesthesia

^bFollowing each test suggestion, children will be asked about the involuntariness experienced during responses to test suggestions