Statistical Analysis for Education and Psychology Researchers

the underlying theory if there is one, for example, for some learning theories the response variable might be a multiplicative r ...

questions about how helpful they thought the course would be with different aspects of the writing process. Each response was sc ...

Table 8.9: Attribution scores for three religious groups (^) Religious Community (^) Christian Religion Group 1 Muslim Religion ...

principle of evaluating the degrees of freedom is important to grasp. The corrected total degrees of freedom is simply, number o ...

Tj=Total score for the jth subgroup (treatment group) ni=Number in the jth subgroup (treatment group) xi=Individual score c) Cor ...

We can now summarize these results in an ANOVA table: Source of variation Degrees of freedom SS MS F Between groups (Model) 2 10 ...

Class Levels Values Religion 3 1 2 3 Number of observations in data set=24 General Linear Models Procedure Dependent Variable:AT ...

Figure 8.15a: Plot to check ANOVA assumptions Figure 8.15b: Plot to check ANOVA assumptions Statistical analysis for education a ...

Interpretation of Computer Output To see whether the data meets the necessary assumptions for ANOVA the plots shown in Figures 8 ...

significant so a post hoc test would not usually be appropriate. For illustrative purposes, however, both an a priori test to es ...

Interpretation The estimate of the difference and the t-value (−0.68) are the same as in the previous worked example. We would c ...

8.8 One-way ANOVA F-test (related) When to Use Many research designs in psychology involve subjects in repeated measurements, th ...

each condition for the spatial and verbal tasks. Data from the authors’ paper is presented in Table 8.10: Table 8.10: Spatial im ...

Table 8.11: Reading accuracy scores for pupils in the reading recovery programme (^) Reading Score Subject Time 1 Time 2 Time 3 ...

(repeated measures)—8.27 where: Trm=Total score over repeated measurements for each subject nrm=Number of repeated measures nt=N ...

The mean square for between conditions (over the three occasions): MS(bet) is SS(bet)/df(bet)=107.2000/2=53.6. Mean square error ...

6 8 7 4 ; data b; set a; drop t1-t3; time=1; score=t1; output; time=2; score=t2; output; time=3; score=t3; output; proc glm data ...

Figure 8.18: Output for One-way repeated measures analysis of variance It is often informative to inspect any differences in mea ...

to describe a trend is to use polynomials (non-linear relationships) of varying degree in a regression analysis. The treatment l ...

Example from the Literature In an experimental study on ways to improve the clarity of journal abstracts Hartley (1994) designed ...