Table 5.

Polar coordinate analysis results corresponding to initiation of interaction as the focal behavior

Code	Quadrant	Ratio	Radius	Angle	SD radius	SD angle	Angle range		nº participants
	Session 2
	IQV > 90
POINTG	III	− 0.71	2.12	227.98	0.15	8.09	218.35	237.60	4
HLI	I	0.24	3.90	10.11	1.39	5.18	6.44	13.77	2
SOVERC	I	0.37	3.20	24.37	0.04	3.94	21.58	27.15	2
EC	IV	− 0.09	4.57	354.75	–	–	–	–	1
EC	I	0.75	3.20	48.59	–	–	–	–	1
CONVG	II	1.00	4.46	95.53	–	–	–	–	1
LLI	IV	− 0.46	2.68	332.69	–	–	–	–	1
NOEC	II	1.00	3.45	94.69	–	–	–	–	1
NONFUC	I	0.04	1.99	2.06	–	–	–	–	1
PX	II	1.00	3.42	94.73	–	–	–	–	1
RES	III	− 0.70	2.50	224.83	–	–	–	–	1
SMIL	II	0.96	2.07	107.16	–	–	–	–	1
	IQV < 90
FUNC	I	0.93	3.20	68.33	–	–	–	–	1
POINTG	II	0.99	2.68	97.39	–	–	–	–	1
POINTG	I	0.83	2.77	56.59	–	–	–	–	1

Code	Quadrant	Ratio	Radius	Angle	SD radius	SD angle	Angle range		nº participants
	Session 10
	IQV > 90
EC	II	1.00	3.55	95.41	0.19	1.94	94.03	96.78	2
FP	II	0.99	2.55	98.29	–	–	–	–	1
SMIL	II	1.00	3.04	96.87	0.93	4.06	94.00	99.74	2
HLI	II	0.99	3.38	96.83	–	–	–	–	1
CONVG	I	0.78	2.23	51.28	–	–	–	–	1
POINTG	II	0.89	1.97	117.47	–	–	–	–	1
SOVERC	II	0.99	2.31	99.61	–	–	–	–	1
EMOG	IV	− .17	2.33	350.47	–	–	–	–	1
	IQV < 90
SOVERC	IV	− 0.22	2.00	347.34	–	–	–	–	1
CONVG	II	0.98	1.98	102.79	–	–	–	–	1
DESCG	IV	− 0.22	1.98	347.21	–	–	–	–	1
POINTG	IV	− 0.22	1.99	347.28	–	–	–	–	1
OBJ	IV	− 0.22	2.01	347.40	–	–	–	–	1

POINTG pointing gestures, HLI high level interaction, SOVERC social verbal communication, EC eye contact, CONVG conventional gestures, LLI low-level interaction, NOEC looking without eye contact, NONFUC non-functional communication, PX proximity, RES responses to an interaction, SMIL smile, FUNC functional communication, FP functional play, EMOG emotional gestures, DESCG descriptive gesture, OBJ sharing object