PSYCH291 Lecture Notes - General Linear Model, Psychoeducation, Response Bias

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23 May 2022
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Found correlation between sat verbal and sat quantitative. Haven"t taken care of any confounds in the original study. Conducted by tyler watts, includes 918 participants (better external validity), same predictor variable (time waited), outcome variable cognitive ability (tested via the. Woodcock johnson psychoeducational test in grade 1 and at age 15) Rationale for conducting the research: replication is a staple of sound science. Previous study had issued with generalizability due to the highly selective sample. Original study was bivariate without considering confounds (used multivariate regression to test for this) Quality of the home environment (through observational assessment) Several measures of these skills (vocab tests, mother"s report of anti-social behaviour, etc) No covariates added to the regression (0. 279, 0. 236) No child background variables controlled for (0. 102, 0. 081) Child background variables and cognitive/behavioural skills controlled for (0. 047, Partial correlational coefficients: similar to betas, but adjusted to be on the same scale as bivariate correlational coefficients (r)

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