Question

aloud. Scoring is time it takes to re enhancing child analysis of varia time (pretest vs tional condition significant main main effect of i Two-Way ANOVA To assess the Effectiveness of a Reading Pro gram What is imp tional conditior STATISTICAL GUIDE In a two-way ANOVA, there are two independent vari outcome variable. The independent variables are usua sifications and the outcome variable is usually a continuous one understand this, examine Figure 1, where the two inde are nominal classifications. The first is Time (pretest and posttest). the second is Condition (control and treatment). The outco GORT-4 fluency scores, a measure of reading ability A two-way ANOVA allows researchers to examine the eff me independent variable, which are called the main effects, It a the effect of the interaction between the independent variabl ects of each called the interaction effect. The results of a two-way ANOVA can number of different wrinkles which are beyond the scope of this section Check out a statistics text for will note one common interpretation of the results of a two-w If the two lines are not parallel, as in Figure 1, then an interaction have a more information on that topic. Here. we is present. effect EXCERPT FROM THE RESEARCH ARTICLE STUDY QUE Factual Que for time The major difference between the treatment and control groups was in how the basal reader was used. The control classes had minimal discussion or introduction prior to reading the story. They then did oral reading one at a time and some silent reading. In the treatment group, the basal readings included strong support and guidance from the teacher before and after reading and repeated readings of one selection in different formats on different days. To examine the effects of the program, the Gray Oral Reading Test, Fourth Edition (GORT-4; Wiederholt & Bryant, 2001) was used as a standardized assessment of text reading fluency. The GORT4 Should t instruct effect) Does

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Answer 1

1)
p-value for time of testing < 0.001
p-value < alpha
hence null hypothesis should be rejected

2)
No , it should not be rejected

3)
yes, figure 1 indicate interaction
lines for control and treatment are not parallel

4)
yes ,as p-value = 0.028 < 0.05

5)
No , p-value > 0.01

6)
p-value = 0.028