Table 4.

Results of conditional growth models with negative affect as a time-varying covariate of social skills

	Model	Cooperation	Assertion	Responsibility	Self-control
Mother negative affect	Intercept	12.19*** (0.43)	15.38*** (0.37)	11.95*** (0.43)	12.85*** (0.41)
	By status‡	−2.23** (0.66)	−2.00* (0.79)	−2.49** (0.79)	−1.88* (0.73)
	By education	−0.11 (0.14)	0.04 (0.15)	–	0.10 (0.14)
	Slope	0.02 (0.09)	−0.01 (0.09)	0.53*** (0.09)	0.15 (0.11)
	By status‡	0.28 (0.16)	0.12 (0.17)	0.07 (0.16)	0.29† (0.17)
	By education	−0.09* (0.04)	−0.07* (0.03)	–	−0.10* (0.04)
	Mom negative affect	−0.13 (0.22)	0.34† (0.19)	0.35† (0.20)	0.15 (0.21)
	By status‡	−0.03 (0.28)	−0.40 (0.32)	−0.80* (0.33)	−0.76* (0.31)
	By education	0.05 (0.06)	0.06 (0.07)	–	0.02 (0.07)
Father negative affect	Intercept	11.58*** (0.46)	15.26*** (0.39)	11.65*** (0.47)	12.30*** (0.49)
	By status‡	−1.34† (0.76)	−3.16*** (0.83)	−3.41*** (0.86)	−2.69** (0.85)
	Slope	−0.06 (0.11)	−0.02 (0.10)	0.56*** (0.10)	0.12 (0.11)
	By status‡	0.55** (0.17)	0.17 (0.19)	−0.00 (0.18)	0.43* (0.18)
	Dad negative affect	0.34 (0.28)	0.52* (0.21)	0.68** (0.25)	0.75* (0.30)
	By status‡	−0.93* (0.43)	0.07 (0.46)	−0.58 (0.44)	−0.72 (0.51)

Coefficients are unstandardised and standard errors are in parentheses.

^†P < 0.10,

^*P < 0.05,

^**P < 0.01,

^***P < 0.001.

^‡Status was coded as TD = 0, ID = 1; ‘by status’ coefficients denote ID coefficient – TD coefficient.

TD, typical development; ID, intellectual disability.