Table 5.

Inter-rater reliability for durations.

Variables	Standardised Cronbach’s Alpha
Explore—activity	0.92
Explore—whimper	1
Explore—near stranger	0.67
Greeting test—body contact/ignored	0.99
Greeting test—body contact/interaction	0.99
Greeting test—whimper/ignored	No variance
Novel object—whimper	0.99
Touch novel object	1
Novel object—near person	0.84
Problem solving—whimper	No variance
Problem solving latency	0.99
Problem solving—whimper (unsolvable)	0.83
Problem solving—Touch object (unsolvable)	0.99