Table 2. Observed behavioural and postural items and their different modalities.

ITEMS	DEFINITIONS
Movement type	Scored: 0 to 3 according to the number of body parts moving. They could be either the head or at least one hand or at least one leg (visible when the bottom of the sleep-sack moved).
	- 0 = no movement
	- 1 = one body-part involved
	- 2 = two body-parts involved
	- 3 = three body-parts involved
Movement range	Scored: small/medium/high according to the range of the movement
	- small = brief movement like a shudder, the general posture was not affected
	- medium = the body part moved less than 45° from its initial position
	- high = the body part moved over 45° from its initial position
Head orientation	Scored: left/front/right according to the position of the head
Body orientation	Scored: left/back/right according to the position of the body (except the head)
Eyes	Scored: closed/half-open/open
	- closed = both eyes closed
	- half-open = upper eyelid of one eye covering more than half the eye, the other eye could be closed or half-open
	- open = upper eyelid of one eye covering less than half the eye, the other eye could be closed, half-open or open.
For each arm:
Angle	8 positions were scored: 1 to 4 according to the angle between the arm and the chest combined with T or A according to the position of the arm in relation to the body
	- 1 = arm between 0° and 45° from the chest (arm alongside body)
	- 2 = arm between 45 and 90°
	- 3 = arm between 90° and 135°
	- 4 = arm between 135° and 180° (arm close to the head)
	- T = arm above the body (Toward the central axis of the body);
	- A = arm sideways (Away from the central axis of the body)
	example: 1A = arm oriented away and between 0° and 45° from the body axis
Bend	Scored: + or – according to the angle between the arm and the forearm
	+ = when the bend was important (angle less than 90°)
	- = when the bend was slight (angle above 90°)
Hand proximity	Scored: close/far according to the proximity of hand to head
	- close = hand above a virtual line level with chest
	- far = under a virtual line level with chest
Hand posture	Scored: closed/open
	- closed = all fingers were folded
	- open = at least one finger was unfolded
Hand contact	Scored: no contact/self-contact/allocontact
	- no contact = neither the palm nor the back of the hand was touching something
	- self-contact = either the palm or the back of the hand was touching part of the body, mainly the other hand, face or head
	- allocontact = either the palm or the back of the hand was touching something around the infant while the other side touched nothing