Results

Linear Regression

From the output we can conclude that household chaos significantly predicted younger sibling’s problem behaviour over and above maternal parenting, child age and gender, t(88) = 2.091, p = 0.039. The positive standardized beta value (0.218) indicates that there is a positive relationship between household chaos and child’s problem behaviour. In other words, the higher the level of household chaos, the more problem behaviours the child displayed. The value of 𝑅2 (0.110) tells us that household chaos accounts for 11% of the variance in child problem behaviour.

Model Summary - sdq
Model R R² Adjusted R² RMSE
M₀ 0.000 0.000 0.000 0.175
M₁ 0.076 0.006 -0.016 0.176
M₂ 0.256 0.065 0.002 0.175
M₃ 0.331 0.110 0.039 0.171
Note.  M₁ includes child_gender, child_age
Note.  M₂ includes child_age, mum_neg, mum_pos, child_warmth, child_anger, child_gender
Note.  M₃ includes child_age, mum_neg, mum_pos, child_warmth, child_anger, child_gender, chaos
ANOVA
Model   Sum of Squares df Mean Square F p
M₁ Regression 0.017 2 0.008 0.273 0.762
  Residual 2.890 93 0.031  
  Total 2.907 95  
M₂ Regression 0.190 6 0.032 1.038 0.406
  Residual 2.717 89 0.031  
  Total 2.907 95  
M₃ Regression 0.319 7 0.046 1.548 0.162
  Residual 2.588 88 0.029  
  Total 2.907 95  
Note.  M₁ includes child_gender, child_age
Note.  M₂ includes child_age, mum_neg, mum_pos, child_warmth, child_anger, child_gender
Note.  M₃ includes child_age, mum_neg, mum_pos, child_warmth, child_anger, child_gender, chaos
Note.  The intercept model is omitted, as no meaningful information can be shown.
Coefficients
Model   Unstandardized Standard Error Standardizedᵃ t p
M₀ (Intercept) 1.291 0.018 72.288 < .001
M₁ (Intercept) 1.263 0.153 8.227 < .001
  child_gender (female) -0.025 0.036 -0.700 0.485
  child_age 6.406×10-4 0.002 0.027 0.266 0.791
M₂ (Intercept) 0.947 0.333 2.847 0.005
  child_age 0.001 0.002 0.064 0.608 0.545
  mum_neg 0.013 0.006 0.236 2.184 0.032
  mum_pos 0.003 0.005 0.050 0.471 0.639
  child_warmth -0.006 0.025 -0.026 -0.232 0.817
  child_anger 0.007 0.017 0.041 0.388 0.699
  child_gender (female) -0.025 0.036 -0.682 0.497
M₃ (Intercept) 0.767 0.338 2.270 0.026
  child_age 0.002 0.002 0.070 0.675 0.501
  mum_neg 0.011 0.006 0.203 1.887 0.062
  mum_pos 0.002 0.005 0.046 0.444 0.658
  child_warmth 5.145×10-4 0.025 0.002 0.021 0.984
  child_anger 0.003 0.017 0.021 0.197 0.844
  child_gender (female) -0.026 0.036 -0.736 0.464
  chaos 0.075 0.036 0.218 2.091 0.039
ᵃ Standardized coefficients can only be computed for continuous predictors.