Table 2.

Descriptive statistics for rate per minute (RPM) CCMR behavioral (frequency) codes during the episodes of the Toddler Still-Face paradigm

Behavior	Play 1			Still-Face			Reunion			F(df = 2,67)
	n/I	M	SD	n/I	M	SD	n/I	M	SD	Episode
Verbal requests	28	0.43a	0.70	52	1.46b	2.13	35	0.46a	0.59	8.80***
Requests for info	35	0.67	1.06	44	0.98	1.34	42	0.81	1.12	1.93
Requests to leave	1	0.02	0.18	1	0.01	0.06	2	0.04	0.21	0.71
Show toy	36	0.69a	1.10	53	1.19b	1.21	39	0.71a	1.08	5.00**
Repetitions	22	0.24a	0.42	60	2.68b	2.94	24	0.32a	0.59	23.31***
Escalation	5	0.04a	0.13	19	0.30b	0.69	4	0.04a	0.16	4.95**
Seeks proximity	32	0.45a	0.62	48	0.79b	0.82	32	0.54a	0.78	6.09**
Touch mom	14	0.22a	0.57	34	0.55b	0.80	26	0.31a	0.57	5.38**
Hug/cling to mom	1	0.01a	0.06	11	0.11b	0.29	4	0.02a	0.13	5.21**
Turn back to mom	19	0.23a	0.52	35	0.44b	0.64	24	0.25a	0.47	3.78*
Move away	3	0.41a	0.55	40	0.63b	0.77	35	0.52a,b	0.70	3.15*
Disruptive actions	18	0.25	0.51	19	0.31	0.74	22	0.33	0.73	0.37
Explanations	3	0.04	0.18	3	0.05	0.26	2	0.01	0.09	1.98
Self-evaluations	2	0.01	0.08	1	0.01	0.06	2	0.03	0.19	0.56

n/I = number of individual children exhibiting a particular code in each episode (out of 70);

M = arithmetic mean; SD = standard deviation

^*p < 0.05,

^**p < 0.01,

^***p < 0.000.

Note: Means with differing superscripts are significantly different from each other as assessed using simulation based post hoc tests at p < 0.05.