Data Analysis
Survey Data. Consistent with the nature of the outcome variables (a mix of continuous and categorical variables), we employed both Ordinary Least Squares (OLS) and logit models. Analyses were preceded by diagnostic tests to establish whether variables met the assumptions of the planned regression models. Two models were estimated for each of ten outcomes. The first model included age, wave, research arm and their
interactions. The second added the dichotomous variable representing whether trained teachers were present in the school at wave 3. The coefficients for variables of interest (wave, research arm and their interactions) were virtually the same in both models and there were no statistically significant effects related to the presence or absence of trained teachers. This suggests that the movement of teachers among schools did not produced different programme responses or outcomes across schools.Consequently, only results for the first models are presented. Age was controlled in all analyses, but since it was never statistically significant as a predictor it is not reported in the tables.
Data Analysis
Survey Data. Consistent with the nature of the outcome variables (a mix of continuous and categorical variables), we employed both Ordinary Least Squares (OLS) and logit models. Analyses were preceded by diagnostic tests to establish whether variables met the assumptions of the planned regression models. Two models were estimated for each of ten outcomes. The first model included age, wave, research arm and their
interactions. The second added the dichotomous variable representing whether trained teachers were present in the school at wave 3. The coefficients for variables of interest (wave, research arm and their interactions) were virtually the same in both models and there were no statistically significant effects related to the presence or absence of trained teachers. This suggests that the movement of teachers among schools did not produced different programme responses or outcomes across schools.Consequently, only results for the first models are presented. Age was controlled in all analyses, but since it was never statistically significant as a predictor it is not reported in the tables.
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