Developmentally Changing Attractor Dynamics of Manual Actions with Objects in Late Infancy

Table 2

Mean estimates for manual actions with objects properties for the preferred and non-preferred hands (+/-95% CIs in parentheses).

	9 months	12 months	15 months	18 months	21 months	24 months
Manual actions with objects duration (s)
Preferred	2.03; (1.70, 2.39)	1.50; (1.31, 1.70)	1.96; (1.70, 2.22)	1.71; (1.48, 1.95)	1.68; (1.45, 1.88)	1.48; (1.31, 1.66)
Non-Preferred	1.11; (0.90, 1.34)	1.04; (0.87, 1.23)	1.18; (0.97, 1.42)	1.05; (0.90, 1.22)	1.02; (0.86, 1.17)	0.86; (0.74, 0.99)
Proportion
Preferred	0.16; (0.12, 0.19)	0.17; (0.13, 0.20)	0.20; (0.17, 0.24)	0.18; (0.16, 0.21)	0.14; (0.11, 0.17)	0.15; (0.13, 0.18)
Non-Preferred	0.05; (0.04, 0.07)	0.08; (0.06, 0.01)	0.07; (0.05, 0.01)	0.06; (0.05, 0.07)	0.06; (0.05, 0.07)	0.05; (0.05, 0.07)
Frequency (per minute)
Preferred	5.07; (3.73, 6.51)	6.60; (5.32, 7.99)	6.17; (5.35, 7.11)	6.64; (5.55, 7.82)	5.02; (4.26, 5.97)	6.24; (5.52, 6.99)
Non-Preferred	3.02; (2.03, 4.16)	4.69; (3.46, 5.94)	3.48; (2.68, 4.26)	3.49; (2.77, 4.33)	3.51; (2.73, 4.38)	3.89; (3.05, 4.89)